Smartwatches / Compare

Amazfit T-Rex Ultra 2 vs Garmin Enduro 4

A

Product A: Amazfit

T-Rex Ultra 2

91 of 150 known

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B

Product B: Garmin

Enduro 4

89 of 150 known

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All 150 fields

Every value links to where we found it.

Only differences

AAmazfit T-Rex Ultra 2

BGarmin Enduro 4

General

7 of 10 differ

Series

T-Rex1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Amazfit T-Rex family. The page compares it with the T-Rex 3, T-Rex 3 Pro and T-Rex Dual Solar.

Enduro1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

W2550GL2N2Maker product pageus.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026Store feed variant SKU W2550GL2N for the single option.

010-04799-00, 010-04799-01, A044131Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026US store SKU 010-04799-00, the only SKU on the US page. The UK and Germany pages sell 010-04799-01. Model number A04413 comes from the manual.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 126: M/N A04413.

GTIN / EAN

850071618860, 69725961097302Maker product pageus.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026US store feed barcode 850071618860. The German store feed carries 6972596109730 under its own SKU TREXU2-C1207005003.

07537593825068Retailer pagevaruste.net/en/p147052/garmin-enduro-4Read 14 October 2026Finnish retailer lists bar code 0753759382506 for product code 010-04799-01 (UK and EU SKU). The check digit is valid. The GTIN of the US SKU 010-04799-00 is not found.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

19 February 20266Press releasezepp.com/press-release/amazfit-announces-the-t-rex-ultra-2-a-titanium-gps-watch-engineered-for-the-extremeRead 15 October 2026Press release dated 19 February 2026.

6 October 20265Press releasegarmin.com/en-US/newsroom/press-release/outdoor/enduro-4-smartwatch-redefines-ultraperformance-with-extreme-battery-life-and-advanced-training-featuresRead 14 October 2026Garmin release dated 6 October 2026.

Status

Available1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The store lists the single option at 549.99 USD and the add to cart button is active.

Available1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026US page shows the watch as sellable with Available to ship in 1-3 business days.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$549.996Press releasezepp.com/press-release/amazfit-announces-the-t-rex-ultra-2-a-titanium-gps-watch-engineered-for-the-extremeRead 15 October 2026549.99 USD in the US. Prices exclude sales tax.

$899.991Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026List price $899.99 USD on the US page, the same as the launch release. Sales tax is not included.5Press releasegarmin.com/en-US/newsroom/press-release/outdoor/enduro-4-smartwatch-redefines-ultraperformance-with-extreme-battery-life-and-advanced-training-featuresRead 14 October 2026Suggested retail price $899.99. US sales tax is not stated.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

€549.94Maker product pagede.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026The German store lists 549.90 EUR including VAT. It matches the nextpit list price. The German price is stored as the euro launch price.7Spec databasenextpit.de/smartwatches/amazfit-t-rex-ultra-2Read 15 October 2026UVP 549.90 EUR including VAT.

€899.993Maker product pagegarmin.com/de-DE/p/2032078/pn/010-04799-01Read 14 October 2026Garmin Germany store list price 899,99 EUR for SKU 010-04799-01. EUR prices include VAT. This is the maker's current list price eight days after launch. The launch release names no euro price.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

US, GB, DE1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026US, GB and DE store pages sell the watch.

ColoursiThe maker's own colour names

Black Magma1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Spec table: Black Magma. The store sells one colour and one size.

Dark Olive ComfortFit fabric band1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026In the Box lists Enduro 4 with dark olive ComfortFit fabric band. No other colour is listed.

Segment

Outdoor1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Amazfit sells it as a rugged outdoor GPS smartwatch in its T-Rex range.

Outdoor1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Garmin lists Enduro under Adventure Watches and calls it an ultraperformance GPS smartwatch.

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

6 October 20282Maker product pagegarmin.com/en-GB/p/2032078/pn/010-04799-01Read 14 October 2026Specs tab, Security Information: Security updates until at least 2028-10-06. This is a minimum. The same page sells SKU 010-04799-01 at GBP 799.99.

Case

6 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

51mm1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026One case size, 51 mm. Compare table: case diameter 51 mm.

51mm1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026One size only. The specs tab states 51 x 51 x 15.7 mm.

Case shape

Round1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The display is round and the product images show an octagonal bezel around a round dial. Stored as round, like the T-Rex 3 Pro.

Round1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab states the display as a 1.4 inch diameter, and the watch is round.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Mixed materials1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Body Material: case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium. Stored as mixed. The marketing text says 51 mm Grade 5 titanium body, which the spec table does not support for the whole case.

Fibre-reinforced polymer1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab: case material fiber-reinforced polymer, bezel material titanium.

Case material (as published)

Case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Technical specifications, Body Material row.

Fiber-reinforced polymer case with titanium bezel1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

Grade 5 titanium1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Technical specifications: back panel in Grade 5 titanium. The press release says titanium bezel and case back.

Not available

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Height51Width51Thickness14.3mm(2 × 2 × 0.6 in)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Dimensions without heart rate base: 51 x 51 x 14.3 mm. The UK comparison table gives the same figure. The US comparison table lists a thickness of 15.1 mm without the heart rate sensor, which conflicts with the 14.3 mm in the spec table. The spec table value is stored.

Height51Width51Thickness15.7mm(2 × 2 × 0.6 in)1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Physical size 51 x 51 x 15.7 mm. Exclusions such as the sensor protrusion are not stated.

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

Not available

57g(2 oz)1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Weight: 66 g (case only: 57 g).

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

89.2g(3.1 oz)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Weight (with strap): 89.2 g. The standard silicone strap with a pin buckle. The maker does not publish a case-only weight.

66g(2.3 oz)1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 202666 g is the total with the supplied ComfortFit fabric band. DC Rainmaker confirms the band adds 3 g to the 57 g case.6Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026The new band adds 3 g and the case weight is identical, so total weight goes from 63 g to 66 g.

Durability

5 of 8 differ

Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

10ATM1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Water-resistance grade 10 ATM. Note 8 says it is rated to ISO 22810:2010 for up to 100 m and passed SGS testing.

10ATM1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Water rating 10 ATM. The manual defines it as pressure equivalent to 100 m.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 125: water rating 10 ATM, pressure equivalent to a depth of 100 m.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 8: according to ISO 22810:2010 the watch achieves 10 ATM.

Not available

Dust and water rating

Not available

Not available

Dive rating

EN13319:2000, ISO 6425:2018, GB/T 18828-20221Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 9 names EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 with report numbers. It also says the watch uses the Buhlmann ZHL-16C decompression model.

Not available

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

45m1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026FAQ: certified for diving and supports depths up to 45 m for freediving and recreational scuba diving.

Not available

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 1: MIL-STD-810H-2019 data comes from report H202512228939-01EN. The tested methods are not listed.

Not available

MIL-STD-810 tests

Not available

Not available

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min-30°C1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Low Temperature Mode keeps essential functions responsive down to -30 C. It is off by default and switches on when the watch surface is below -10 C (note 10). No upper limit is published.

Min-20Max45°C4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 125: operating and storage temperature range -20 to 45 C. The charging range of 0 to 45 C is not used.

Display

8 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

MIP1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Display Material: AMOLED.

Sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

1.5in(3.8 cm)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Size: 1.5 inch.

1.4in(3.6 cm)1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Display Size 1.4 inch (35.56 mm) diameter.

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Resolution 480 x 480.

280 × 280px1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

322ppi1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026PPI 322 as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The spec table row labelled Touchscreen names sapphire glass. The manual describes tap and swipe gestures, so touch is confirmed there.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Commonly used gestures and buttons: tap and swipe on the screen.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

Not available

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

3,000nits1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Peak brightness up to 3,000 nits. Note 17: not supported in low temperature mode or when battery is below 30%, and needs automatic brightness.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Battery table lists an AOD mode figure. The manual describes Settings > Display > Always On Display.

Not available

Display cover

Sapphire1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Sapphire1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Display cover (as published)

Sapphire glass1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Screen material: sapphire glass. The Touchscreen row of the spec table also says sapphire glass.

Power Sapphire1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Lens material Power Sapphire, with solar charging.

Platform

4 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp OS, Zepp Health's own operating system.

Proprietary1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Garmin's own watch software. Connect IQ is the app store.

OS at launch

Zepp OS 53Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The UK comparison table lists OS Zepp OS 5 for the T-Rex Ultra 2.

Not available

Software

Not available

Not available

Latest OS

Zepp OS 69Press articlegadgetsandwearables.com/2026/07/22/amazfit-t-rex-3-pro-ultra-2-zepp-os-6-updateRead 15 October 2026Article of 22 July 2026: Zepp OS 6 starts rolling out to the T-Rex 3, T-Rex 3 Pro and Ultra 2.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Supported devices: Android 7.0 and above, iOS 15.0 and above. Application: Zepp App.

iOS, Android1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Phone requirement

Android 7.0 and above, iOS 15.0 and above, with the Zepp App1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Supported Devices and Application rows.

Not available

App store

Yes5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026App installation: more apps install from the app store in the Zepp App.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Connect IQ (downloadable watch faces, data fields and apps) with an on-device Connect IQ Store.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026AI assistant: Zepp Flow, in select countries and regions. Note 11 lists the supported languages.

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

Memory

0 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

Not available

Not available

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

64GB1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Storage (note 18): Total 64 GB. Available 26.7 GB for maps, music, mini programs, records and watch faces because the system uses the rest. The total is stored.

64GB1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Memory/History 64 GB. This is nominal storage for maps, music and data.

Health sensors

5 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor (5PD + 2LED)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sensors, Health: BioTracker 6.0 PPG biometric sensor (5PD + 2LED).

Garmin Elevate Gen 56Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026Both Enduro 4 and fenix 9 have Garmin's Elevate Gen5 optical HR sensor. Garmin's own pages say only Garmin Elevate.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

Not available

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs list the Garmin ECG app. The ECG app needs an eligible country and is for adults aged 22 and over.6Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026Both watches have medically certified ECG hardware and features.

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H monitoring and manual blood-oxygen saturation. Not a medical device (note 13).

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Pulse Ox blood oxygen saturation monitor. Not available in all countries.

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H monitoring lists skin temperature (thermometer).

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Health & Wellness Monitoring lists skin temperature.7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Skin temperature: Yes, in agreement with the Garmin spec table.

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

Not available

None7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Blood pressure: No. Garmin lists no blood pressure feature.

Body composition sensor

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Body composition: No. Garmin's complete sensor list has no body composition sensor.

Skin conductance (EDA)

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Galvanic skin response: No. Garmin's complete sensor list has no skin conductance sensor.

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Not available

Motion and environment sensors

2 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Compass

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Outdoor tools list Compass and the movement sensors include a geomagnetic sensor.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sensors, Movement: ambient light sensor.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Depth gauge

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Dive tracking shows time and depth. The manual states the maximum measurement depth.

No6Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026The fenix 9 series has a depth gauge. The Enduro 4 does not.

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

45m1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Manual: maximum measurement depth 45 m. The page says dives up to 45 m.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Diving Technical Specifications: maximum measurement depth 45 m / 147.6 ft, accuracy per EN13319.

Not available

Water temperature sensor

Not available

Not available

Health and fitness

4 of 5 differ

Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H heart rate, blood oxygen and stress, abnormal high and low heart rate alerts, sleep heart rate variability, sleep stages including REM, and HybridCharge energy intelligence with BioCharge. The software notes mention a Readiness app. Not a medical device.

Continuous heart rate, Heart rate alerts, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Heart rate every second, abnormal heart rate alerts (high and low), ECG app, Pulse Ox, HRV status, sleep score with sleep stages, all-day stress, training readiness and women's health. Breathing variations during sleep are not a sleep apnea notification, so that option is not stored.

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

Automatic workout detection, VO2 max, Training load, Recovery advice, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Golf courses, Ski resort maps1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Smart recognition of 8 sports movements, VO2 Max (note 12), Training Load, recovery, pool and open-water swim, strength training with recognition of 25 movements, interval training via the watch, offline maps, turn-by-turn directions, direct return navigation, 40,000+ golf course maps and ski resort maps. Ground contact time and vertical amplitude are named in the marketing copy but not stored because the page does not say whether they need an external sensor.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Return to the starting point: straight line return or Backtrack along the route already travelled, which is the trackback option.

VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Climb detection, Golf courses, Ski resort maps1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Spec table lists VO2 max, training load, recovery time, running dynamics, running power, pool and open-water swim metrics, automatic rep counting, improved intervals, courses with turn-by-turn directions, TracBack, ClimbPro and trail run auto climb, 43,000 preloaded golf courses and preloaded ski resort maps. Move IQ is listed without a description, so automatic workout detection is not stored. More than 100 activity profiles is not an exact count.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

1871Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sports Features row: 187 sports modes. Marketing copy says 180+.

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Scuba, single gas, Freedive1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Pro-grade waterproofing: recreational scuba diving and freediving with automatic dive detection. Note 9: Buhlmann ZHL-16C decompression model. The manual says no mixed-gas diving.

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Peripherals: heart rate belt, running power meter, Stryd foot pod, cycling power meter, cycling speed and cadence sensors. The September 2026 software notes add FTMS indoor bike trainers and rowing machines. Note 15: only BLE devices are supported.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Spec table lists HRM running pace and distance, Vector and Rally power meters, speed and cadence sensors, foot pod capable and smart trainer control. The manual lists the same sensor types. Metrics that need an accessory are not built-in sensors.

Safety

3 of 6 differ

Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

Not available

No4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed pages 109 and 110: incident detection is available only for certain outdoor activities. This is not general fall detection.

Car crash detection

Not available

Not available

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

Not available

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Assistance row. The watch sends a message with a live location link to preset contacts through the paired phone. It does not call emergency services.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed pages 109 and 110: holding the upper-left button for five seconds sends an assistance message with a LiveTrack link and GPS location to assistance contacts. It needs the paired phone with a data plan. The manual says Garmin Connect does not contact emergency services.

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Live event sharing and LiveTrack through the paired phone.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed page 109: LiveTrack sends a web page link to friends and family. Live Event Sharing needs a compatible Android phone.

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Flashlight with 4 white levels, 1 green mode and Boost Mode.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026LED flashlight in the highlights. The press release says white and red light.5Press releasegarmin.com/en-US/newsroom/press-release/outdoor/enduro-4-smartwatch-redefines-ultraperformance-with-extreme-battery-life-and-advanced-training-featuresRead 14 October 2026Integrated LED flashlight with white and red light options.

Positioning

1 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC8Reviewcomputerwoche.de/article/4171180/amazfit-t-rex-ultra-2-im-test-grose-starke-und-robuste-outdoor-smartwatch.htmlRead 15 October 2026The test names the six systems as GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC with dual-band GNSS. The maker states six systems and does not name them. Signal bands are not stored.

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Sensors list GPS, GLONASS, Galileo, QZSS and BeiDou with SatIQ. Frequency bands per system are not listed.

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Positioning: dual-band positioning and 6 satellite positioning systems with a circularly-polarized GPS antenna.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Highlights list Multi-band GPS.

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Navigation and maps: offline maps supported. Full-colour base maps are preloaded.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Built-in mapping with preloaded road and trail maps and downloadable cartography support.

Connectivity

5 of 15 differ

BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection: Wi-Fi 2.4 GHz, Bluetooth 5.2, BLE.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Connectivity row lists Bluetooth, ANT+ and Wi-Fi. No Bluetooth version is published.

Bluetooth version

5.21Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection row: Bluetooth 5.2, BLE.

Not available

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection: Wi-Fi 2.4 GHz. OTA update via Wi-Fi is supported.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Connectivity row lists Wi-Fi. No Wi-Fi standard is published.

Wi-Fi standard

Not available

Not available

Wi-Fi bands

2.4 GHz1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection row lists 2.4 GHz only.

2.4 GHz4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 126: wireless frequencies list only 2400-2483.5 MHz (below 19 dBm) and 13.56 MHz. The 2.4 GHz band is the only radio band, so no 5 GHz Wi-Fi. No Wi-Fi standard is published.

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection lists Wi-Fi 2.4 GHz, Bluetooth 5.2 and BLE only. No cellular radio is listed.

No4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026The complete radio list on printed page 126 has only 2.4 GHz and 13.56 MHz, so there is no cellular radio. DC Rainmaker also says there is no LTE.

Network

Not available

Not available

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

Not available

Not available

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

Not available

NFCiSome regions sell an NFC edition, so it is per variant.

Yes3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay text: integration of NFC technology. The usage scenarios also count NFC card swipes.8Reviewcomputerwoche.de/article/4171180/amazfit-t-rex-ultra-2-im-test-grose-starke-und-robuste-outdoor-smartwatch.htmlRead 15 October 2026The spec table lists NFC (Zepp Pay). In Germany payment works only through the third party Curve.

Yes4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed page 126 lists 13.56 MHz, used for Garmin Pay.7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026NFC / connected pay: Yes, in agreement with the manual's 13.56 MHz radio.

Contactless payments

Yes3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay binds up to eight bank cards for password-protected contactless payment. Note 16: supported by Curve and participating issuer banks in 31 European countries. The US page does not mention Zepp Pay.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Garmin Pay contactless payments. Not available in all regions.

Payment services

Zepp Pay3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay, via Curve and participating issuer banks in 31 European countries.

Garmin Pay1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Ultra-wideband

Not available

No4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026The complete radio list on printed page 126 has only 2.4 GHz and 13.56 MHz, so there is no UWB radio. Gadgets & Wearables also lists no UWB.7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026UWB: No.

Satellite

Not available

None4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026The complete radio list shows no satellite radio. DC Rainmaker says there is no satellite messaging.

ANT+

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 15: peripheral connections only support BLE devices. ANT+ is not listed.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Audio

3 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Mic and Speaker: Support.

No6Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026Enduro 4 has a simple beeper and no speaker.7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Speakers: No.

Microphones

Not available

06Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026Enduro 4 has no microphone.7Spec databasegadgetsandwearables.com/technical-specs/garmin-enduro-4Read 14 October 2026Microphone: No.

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Phone only1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026FAQ: the watch supports Bluetooth phone calls and texts. Calls use the paired phone.

None4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed page 88: the watch shows an incoming call, but to talk to the caller you must use your connected phone. Gadgets & Wearables and DC Rainmaker also say there is no calling on the watch.6Reviewdcrainmaker.com/2026/10/garmin-enduro-4-vs-fenix9-vs-enduro3-detailed-comparison-review.htmlRead 14 October 2026Voice control and calling features need a microphone, which the Enduro 4 does not have.

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Music Storage: Support. The manual says local mp3 files play through the speaker.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Music storage in the highlights. Spotify, Deezer or Amazon Music playlists can be downloaded, subscription may be required.

Controls

2 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

41Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Buttons: 4.

54Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Button Functions, printed pages 6 and 7: five numbered push buttons plus the touchscreen.

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

UP, SELECT, BACK, DOWN5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026UP, DOWN, upper right SELECT and lower right BACK. Press and hold UP turns the flashlight on.

Upper-left button, Middle-left button, Lower-left button, Upper-right button, Lower-right button4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Button Functions: Upper-left, Middle-left, Lower-left, Upper-right and Lower-right button.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

None5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026No crown is described. Controls are four buttons and the touchscreen.

None4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026The button and touchscreen overview shows only push buttons and no crown.

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

None5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026No rotating bezel is described.

None4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026The button and touchscreen overview shows no rotating bezel.

Gestures

Not available

Not available

Battery and charging

7 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

870mAh1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Battery Capacity: 870 mAh (rated value).

Not available

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AAmazfit T-Rex Ultra 2

Mode	With solar	Hours (h)
Smartwatch	No	720
Heavy use	No	360
Always-on	No	240
GPS, dual-band	No	50
GPS, power saving	No	90
Max battery GPS	No	177

Source1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Typical use up to 30 days (720 h, note 7 scenario). Heavy use up to 15 days. AOD mode up to 10 days, tested with the heavy-use workload and AOD on. Accurate GPS up to 50 h with heart rate on and dual-frequency, all satellites. Power-saving GPS up to 90 h, single frequency. GPS Max Battery Life 177 h, only in Hiking and Climbing modes with heart rate, Bluetooth and wrist raise off. Not stored: trail running normal 44 h and heavy 30 h, low temperature mode 40 h with GPS and 32 days without, since the schema has no mode for them.

BGarmin Enduro 4

Mode	With solar	Hours (h)
Smartwatch	No	864
Smartwatch	Yes	2,160
Low power	No	2,208
GPS, automatic system selection	No	80
GPS, automatic system selection	Yes	144
GPS, automatic system selection with music	No	22
GPS, automatic system selection with music	Yes	25
Max battery GPS	No	210
Extended GPS workout	No	120
Extended GPS workout	Yes	320
Expedition	No	1,848

Source1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Current US battery table, also in the manual. Days are converted to hours exactly. Normal activity mode with SatIQ is stored as automatic system selection. Solar rows follow the page footnotes: smartwatch and low power modes assume all-day wear with 3 hours per day outside in 50,000 lux, activity modes assume use in 50,000 lux. Rows that read unlimited with solar have no number and are not stored. Max Accuracy (60 h, 90 h with solar) is not stored because no option fits and Garmin does not say which GNSS bands it uses.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Battery Information, printed page 126. It matches the US page. Normal or Balanced power mode, Max Battery, Extended and Max Accuracy are the manual's names. The satellite settings text says every satellite mode uses SatIQ to select satellite systems dynamically.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

720h=CalculatedFrom Claimed battery life

864h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

240h=CalculatedFrom Claimed battery life

Not available

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

Not available

Not available

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: solar charging not supported.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Solar charging in the highlights and a Power Sapphire solar lens.

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Not available

Proprietary plug1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Charging method: Garmin proprietary plug charger. The USB end of the cable is not the watch port.

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Magnetic charging head. The box has a charging base that works with USB Type-C but no cable. The store FAQ says a USB-C cable is not supplied.1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Packing list: magnetic charging head (no cable). What's in the Box: charging base (USB Type-C compatible) but no cable. FAQ: no USB-C cable included.

Proprietary charging cable with a USB-C end. The manual says to plug the other end into a USB-C computer port or an AC adapter with a 5 W minimum power rating. The watch does not solar charge while connected to an external power source or when the battery is full.4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Printed page 125: plug the cable into a USB-C computer port or AC adapter (5 W minimum power rating). The watch does not solar charge when connected to an external power source or when the battery is full.

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

Not available

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

Not available

Not available

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Not available

Not available

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

Not available

Not available

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

Not available

Not available

Measured

None of 4 known

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

Not available

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

Not available

Not available

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

Not available

Strap

4 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

26mm1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Strap width 26 mm.

26mm1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026QuickFit watch band compatible (26 mm).

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: strap attachment 26 mm quick release.

Yes1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026QuickFit watch band compatible. The press release says QuickFit makes swapping bands simpler.

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

26 mm quick release1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: strap attachment 26 mm quick release.

QuickFit 26 mm1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026QuickFit watch band compatible (26 mm).

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Silicone1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Strap materials: silicone. Buckle: classic pin buckle.

Fabric1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab Strap material ComfortFit. The press release calls it the ComfortFit Fabric Band.

Strap

Not available

ComfortFit Fabric Band1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Press release name: ComfortFit Fabric Band.5Press releasegarmin.com/en-US/newsroom/press-release/outdoor/enduro-4-smartwatch-redefines-ultraperformance-with-extreme-battery-life-and-advanced-training-featuresRead 14 October 2026The ComfortFit Fabric Band is new to Enduro 4.

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AAmazfit T-Rex Ultra 2

Wrist (min) (mm)	Wrist (max) (mm)
145	215

Source1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Min. and max. wrist dimensions: 145-215 mm.

BGarmin Enduro 4

Size	Wrist (min) (mm)	Wrist (max) (mm)
ComfortFit Medium	145	220

Source1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026Specs tab lists wrist circumference for ComfortFit Medium 145-220 mm. The same table lists silicone, leather and metal bands that fit the case, which are accessories and are not stored. The box contents do not name a band size.

Regulatory

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FCC ID

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SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

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SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

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Other certifications

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In the box

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In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Packing list verbatim.

Enduro 4 with dark olive ComfortFit fabric band, Charging/data cable, Documentation1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026In the Box tab, verbatim.

Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The packing list has a charging head and no USB cable or power adapter.

No1Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026The box has a charging/data cable and documentation, with no mains or USB power adapter.

Links

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Product page

us.amazfit.com/products/t-rex-ultra-21Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

www.garmin.com/en-US/p/2032078/pn/010-04799-001Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Spec sheet

Not available

www.garmin.com/en-US/p/2032078/pn/010-04799-001Maker product pagegarmin.com/en-US/p/2032078/pn/010-04799-00Read 14 October 2026

Manual

support.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdf5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Amazfit T-Rex Ultra 2 user manual, global version.

www8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdf4Owner's manualwww8.garmin.com/manuals/webhelp/GUID-25EFCCBC-D0EB-4E1B-AE9F-B4B900891C20/EN-US/Enduro_4_OM_EN-US.pdfRead 14 October 2026Enduro 4 Owner's Manual, English (US) PDF. The link comes from the Garmin Rumors wiki page for Enduro 4. Garmin's support page was not reachable.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Store footer says 1 Year Warranty. This is the US store.

1year9Maker product pagegarmin.com/en-US/legal/consumer-limited-warrantyRead 14 October 2026Garmin US Consumer Limited Warranty, revised December 30, 2025: non-aviation products are warranted for one year from purchase. US scope. Statutory rights in other markets are separate.

Both are also in the API. Back to all smartwatches.