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soundcore Boom Go 3i vs Ultimate Ears WONDERBOOM 4

A

Product A: soundcore

Boom Go 3i

55 of 96 known

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B

Product B: Ultimate Ears

WONDERBOOM 4

48 of 96 known

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Every value links to where we found it.

Only differences

Asoundcore Boom Go 3i

BUltimate Ears WONDERBOOM 4

General

5 of 8 differ

Series

Boom Go1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Product title is Boom Go 3i. Boom 3i is a different, larger speaker.

WONDERBOOM1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

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

D5103, D5103010, D5103020, D5103030, D51030502Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026Public store feed lists SKUs D5103010, D5103020, D5103030 and D5103050. D5103 is the hardware model on the EU declaration. Two-pack bundle SKUs (BUNDLE-D5103010-2 and similar) are excluded.17Maker spec sheet (PDF)salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000036183/en_US/000036183.pdfRead 15 October 2026EU and UK Declaration of Conformity for model D5103.

SR01922Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026

GTIN / EAN

194644310219, 194644310165, 194644310189, 1946443099922Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026Barcodes of the four single-speaker SKUs. The two-pack bundles have no barcode.3Maker product pagede.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026German store barcodes match the US store barcodes.

Not available

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

January 202618Press articlesoundguys.com/soundcore-announces-boom-go-3i-compact-bluetooth-speaker-150291Read 15 October 2026SoundGuys announcement dated 2026-01-07, during CES week. Maker's exact announcement day is not confirmed.

26 June 20244Press releasenews.logitech.com/press-releases/news-details/2024/The-Rugged-Ultimate-Ears-EVERBOOM-Superior-Sound-That-Is-Waterproof-Dustproof-and-Floatable/default.aspxRead 8 October 2026

Status

Available1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026US store lists four colors in stock on 2026-10-15.

Available1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

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.

$79.991Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Regular price $79.99 USD, no compare-at price. Matches the launch price in the SoundGuys announcement.18Press articlesoundguys.com/soundcore-announces-boom-go-3i-compact-bluetooth-speaker-150291Read 15 October 2026Expected to retail for $79.99 (US).19Reviewsoundguys.com/soundcore-boom-go-3i-review-a-rugged-speaker-for-outdoor-adventures-154204Read 15 October 2026Review header lists $79.99.

$99.994Press releasenews.logitech.com/press-releases/news-details/2024/The-Rugged-Ultimate-Ears-EVERBOOM-Superior-Sound-That-Is-Waterproof-Dustproof-and-Floatable/default.aspxRead 8 October 2026US launch MSRP $99.99 before tax.

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.

Not available

Not available

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

US, DE2Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026US store sells all four SKUs.3Maker product pagede.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026German store sells the same four SKUs in EUR and shows them available.

US1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

ColoursiThe maker's own colour names

Midnight Black, Beige, Blue, Rose Gold2Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound.jsRead 15 October 2026Color options Midnight Black, Beige, Blue and Rose Gold.

Active Black, Joyous Bright, Hyper Pink, Cobalt Blue, Sand1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Speaker typeiHome covers speakers made to stay in one place, including smart speakers. A speaker with Wi-Fi or a voice assistant can be of any type.

Portable1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Maker calls it a portable Bluetooth speaker.

Portable1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Audio

11 of 18 differ

Audio channelsiSound channels reproduced by one speaker. Pairing two speakers for stereo is separate.

Mono19Reviewsoundguys.com/soundcore-boom-go-3i-review-a-rugged-speaker-for-outdoor-adventures-154204Read 15 October 2026Reviewer calls it a 15W mono speaker.

Stereo1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026Maker describes stereo sound from one physical speaker. Two-speaker Double Up stereo separates left and right between units.

Audio driversiPowered audio transducers in one speaker. Passive radiators are counted separately. Circular diameter and rectangular width and height have separate columns. Per-driver power must state continuous or RMS basis and battery or mains operation in the source note.

Asoundcore Boom Go 3i

Driver type	Count	Diameter (mm)
Full-range dynamic driver	1	53.34

Source4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Speaker Driver 2.1 inches (53.34 mm). The guide does not state the driver shape or power. It is stored as a diameter of one driver. Reviewers describe one driver.20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026Reviewer describes one dynamic 2-inch driver rated at 15 W. The maker manual gives 2.1 inches.22Retailer pagepanacompu.com/panama/en/product-information/anker-soundcore-boom-go-3i-portable-wireless-speaker-with-bassup-20-bluetooth-usb-c-midnight-blackRead 15 October 2026Retailer says Full-Range Driver x 1.

BUltimate Ears WONDERBOOM 4

Driver type	Count
Active audio driver	2

Source1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026Maker embedded technical specs explicitly list two active drivers and two passive radiators. Diameter omitted because manufacturer support says 34 mm while product page says 40 mm.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

121Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 2026Review says one driver with one additional passive membrane. The maker does not state the radiator count.

21Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Rated audio poweriMaker-published total rated continuous audio output. Battery power is used for portable speakers when mains and battery ratings differ. Peak marketing power is separate.

Not available

Not available

Rated audio power on mainsiTotal rated continuous audio output with external power. Store a separate battery rating when the maker publishes both.

Not available

Not available

Audio output power (unspecified rating)iMaker- or reviewer-published audio output power whose continuous or peak rating basis is not stated. This is separate from rated continuous output and explicitly published peak output.

15W1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page says 15W powerful output and 92 dB peak loudness. No continuous, RMS or peak basis is stated, so only the unspecified-rating field is filled. 92 dB is a loudness figure and not a power value.4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Audio Output Power 15 W. No continuous or RMS basis.14Maker product pageservice.soundcore.com/product-description/a08e200000K6u8tAABRead 15 October 2026Output power 15W.

Not available

Peak audio poweriExplicitly published peak audio output. Never substitute for rated continuous output.

Not available

Not available

Frequency response lower limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

80Hz22Retailer pagepanacompu.com/panama/en/product-information/anker-soundcore-boom-go-3i-portable-wireless-speaker-with-bassup-20-bluetooth-usb-c-midnight-blackRead 15 October 2026Retailer spec tab for D5103010 says Frequency 80Hz - 20kHz. No tolerance or mode is stated. The maker page does not publish a frequency range. Same table mislabels 92 dB peak loudness as sensitivity.

80Hz2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026Speaker Specifications: 80 Hz to 16 kHz at -3 dB. Not a measured reviewer result.

Frequency response upper limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

20kHz22Retailer pagepanacompu.com/panama/en/product-information/anker-soundcore-boom-go-3i-portable-wireless-speaker-with-bassup-20-bluetooth-usb-c-midnight-blackRead 15 October 2026Same retailer spec line, 20 kHz upper limit.

16kHz2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026Speaker Specifications: 80 Hz to 16 kHz at -3 dB.

Signal-to-noise ratio (claimed)

Not available

86dB2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026Speaker Specifications: 86 dB unweighted.

Adjustable equalizeriUser-adjustable frequency bands. Selecting fixed sound presets alone does not qualify.

Yes20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026App has a 9-band custom EQ next to four presets.21Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 2026Custom equalizer with 9-band faders.

No5Reviewrtings.com/speaker/reviews/ultimate-ears/wonderboom-4Read 8 October 2026Public verdict: no custom EQ. Outdoor and Podcast presets are stored separately in sound_modes.

Equalizer bandsiNumber of user-adjustable frequency bands. Do not count sound presets.

920Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 20269-band EQ for custom sound profiles. Presets are not counted.21Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 20269 faders. Four presets are separate.

Not available

Automatic sound adjustmentiAdjusts audio to placement or playback conditions. Keep the named feature and conditions in the source note.

Not available

Not available

Sound modesiNamed playback modes. Battery extension modes are also qualified in battery source notes.

BassUp, Normal, Eco Mode, soundcore Signature, Treble Boost, Voice, Balanced4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Button table lists 3 sound modes BassUp, Normal and Eco Mode. The app lists four EQ presets soundcore Signature, Treble Boost, Voice and Balanced. Eco Mode turns off lights and BassUp for longer playtime.

Standard, Outdoor Boost, Podcast1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Wireless stereo pairingiTwo compatible speakers can play separate left and right channels.

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026True Wireless Stereo mode pairs two identical speakers as left and right channels.

Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Speaker link protocolsiNamed systems for linking compatible speakers, such as PartyBoost, Auracast or Party Connect. Linking support does not establish compatibility across all models.

True Wireless Stereo (TWS), Auracast4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026TWS for two speakers and Auracast mode for three or more.15Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033526/en_US/000033526.pdfRead 15 October 2026QSG explains TWS for two speakers and Auracast for three or more.20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026TWS stereo for two speakers and Auracast to chain more.21Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 2026Auracast speakers cannot link with older PartyCast speakers.

Double Up1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Max linked speakersiPublished maximum in a speaker group. A stereo pair is recorded separately. A figure such as 100+ is stored as 100.

Not available

21Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Max Bluetooth group speakersiPublished maximum speakers in one Bluetooth playback group, including the first speaker. Source notes name the compatible models or families, linking system and firmware requirements. Wi-Fi groups and concurrent Bluetooth source devices are excluded. A stereo pair alone does not establish the maximum when other Bluetooth linking systems are supported. A figure such as 100+ is stored as 100.

Not available

Not available

Connectivity

8 of 16 differ

Bluetooth audio playbackiPlays audio streamed over Bluetooth from a phone or other source. Bluetooth used only for setup or app control does not count.

Yes5Maker product pageservice.soundcore.com/article-description/What-Bluetooth-codecs-does-the-Boom-Go-3i-supportRead 15 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Bluetooth versioniVersion of the Bluetooth radio. Some Wi-Fi speakers use Bluetooth only for setup. See Bluetooth audio playback.

6.04Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Bluetooth Version 6.0.6Maker product pageservice.soundcore.com/article-description/What-Bluetooth-version-does-the-Boom-Go-3i-useRead 15 October 2026Answer says Bluetooth 6.0.

5.22Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026

Bluetooth codecsiExplicitly supported receive codecs. Bluetooth version alone does not establish codecs.

SBC, AAC5Maker product pageservice.soundcore.com/article-description/What-Bluetooth-codecs-does-the-Boom-Go-3i-supportRead 15 October 2026Answer says SBC and AAC.

Not available

Bluetooth profiles

Not available

A2DP1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Bluetooth LE AudioiExplicit LE Audio support. Bluetooth LE for app control alone does not qualify.

Not available

Not available

AuracastiExplicit Auracast support. Sending, receiving and speaker-group roles belong in source notes.

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Dedicated Auracast button and Auracast Mode section. One speaker connects to a phone and the Auracast button on several Boom Go 3i speakers syncs the audio. It works with soundcore devices that use the same Auracast protocol and is not compatible with PartyCast.16Maker product pageankerjapan.com/products/d5103Read 15 October 2026Auracast supported. Three or more speakers can be linked.

Not available

MultipointiConcurrent Bluetooth source connections. Pairing memory and speaker-to-speaker linking do not qualify.

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Bluetooth button press with one speaker connected enables the Dual Connections feature. If a second connected device starts playing, the speaker takes over.20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026Multipoint allows pairing with two devices at once.

Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Multipoint source devicesiMaximum concurrently connected Bluetooth source devices, not remembered pairings.

24Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Dual Connections means two sources. The review at headphonecheck.com says two devices at once.20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026Two devices at once.

21Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Bluetooth range (claimed)iMaker-claimed Bluetooth range to the source device. Test conditions belong in the source note.

30m4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Bluetooth Range 30m.

40m1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Wi-FiiBuilt-in Wi-Fi, for audio streaming, setup or control.

Not available

No5Reviewrtings.com/speaker/reviews/ultimate-ears/wonderboom-4Read 8 October 2026Public Wi-Fi row explicitly says No.

Wi-Fi standardsiOne 802.11 name per item, such as 802.11ax. A Wi-Fi generation is written as its standard, so Wi-Fi 5 is 802.11ac and Wi-Fi 6 is 802.11ax. Older standards are listed only when a source names them.

Not available

Not available

Network audio protocolsiNamed systems that stream audio to the speaker over the home network. AirPlay is written as AirPlay 2. Chromecast built-in is written as Google Cast. Other names follow the maker, such as Spotify Connect.

Not available

Not available

USB audio inputiPlayback from a connected computer or phone through USB. Charging, service ports and USB flash-drive playback do not qualify.

Not available

No2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026USB-C cable is explicitly for charging only.

USB drive playbackiPlayback of audio files on a connected USB storage device.

Not available

Not available

USB audio file formats

Not available

Not available

PortsiPhysical speaker connectors. Record charging, audio input, power output and service roles separately. A shared microphone and guitar jack is one port. A combo jack that takes XLR and 6.35 mm plugs is 6.35 mm audio, and the role names XLR. Optical is a TOSLINK digital audio socket.

Asoundcore Boom Go 3i

Connector	Count	Role
USB-C	1	Charging input and power-bank output

Source4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026One USB-C charging port. It also supplies power to other devices.10Maker product pageservice.soundcore.com/article-description/Does-the-Boom-Go-3i-have-an-aux-in-portRead 15 October 2026Answer says there is no aux-in port.

BUltimate Ears WONDERBOOM 4

Connector	Count	Role
USB-C	1	Charging input only

Source2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026

Controls and software

5 of 8 differ

SpeakerphoneiBuilt-in microphone and call support, through a connected phone or a voice assistant's calling. A microphone used only for voice commands does not count. Microphone inputs for karaoke are separate.

No19Reviewsoundguys.com/soundcore-boom-go-3i-review-a-rugged-speaker-for-outdoor-adventures-154204Read 15 October 2026No built-in microphone for calls. The App Voice Amplifier uses the phone and is not a speakerphone.

No5Reviewrtings.com/speaker/reviews/ultimate-ears/wonderboom-4Read 8 October 2026Public Voice Assistant verdict explicitly says no built-in microphone.

Voice assistantsiVoice assistants explicitly usable through the speaker, such as Amazon Alexa, Google Assistant, Siri or Sonos Voice Control. State whether a connected phone is required.

Not available

Not available

Controls

Power, Bluetooth pairing, TWS pairing, Auracast pairing, Volume up/down, Play/pause, Next/previous track, Sound mode (BassUp, Normal, Eco), Light effects on/off and selection, Emergency alarm, Factory reset4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Button table. Mode button functions can be changed in the app. Reset is Bluetooth plus Volume Up held for 10 seconds.15Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033526/en_US/000033526.pdfRead 15 October 2026QSG shows the sound mode button (BassUp, Normal, Eco) and says button functions can be changed in the app.

Power, Bluetooth pairing, Volume up/down, Play/pause, Next track, Outdoor Boost/Podcast mode, Double Up, Battery level3Owner's manualsupport.logi.com/hc/en-us/articles/17139116395031-Getting-Started-UE-WONDERBOOM-4Read 8 October 2026Manual Power, Control Music, Explore our EQ Modes, Double Up and Check Battery Level sections. Double Up works with WONDERBOOM 3 or 4, excluding other BOOM families.

Companion app

soundcore4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026soundcore app.

Not available

App platforms

iOS, Android4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026App Store and Google Play logos in the guide.

Not available

User firmware updates

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Firmware update prompt appears when the speaker connects to the app.

Not available

Built-in lightingiDecorative or ambient lighting. Status, battery, connection and microphone indicator LEDs alone do not qualify.

Yes1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page lists 6 music-reactive modes and 8 ambient lighting modes with customizable colors. The mode names are not published, so no mode list is stored.4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026LED light strips change with the rhythm of the music. Mode button switches effects.

Not available

Lighting modes

Not available

Not available

Smart home

None of 3 known

Matter controlleriCan add and control Matter devices. Being a Matter device alone does not count.

Not available

Not available

Thread border routeriConnects Thread smart home devices to the home network.

Not available

Not available

Zigbee hubiA built-in Zigbee radio that controls Zigbee smart home devices.

Not available

Not available

Battery and charging

8 of 17 differ

Built-in battery

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Built-in rechargeable battery with a real-time LED display. The Soundcore FAQ says it cannot be replaced.

Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Playback time (claimed)iMaximum maker-claimed music playback on one charge in normal playback mode. Battery extension or reduced-bass boost modes belong in battery_life_boost_h. Record volume and lighting conditions in the source note.

24h1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page says 24 hours of playtime on a single charge. The conditions are in the FAQ.4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Playtime 24 Hours and that it varies by volume level and music content.7Maker product pageservice.soundcore.com/article-description/How-long-does-the-Boom-Go-3i-s-battery-last-when-playing-musicRead 15 October 2026Standard: up to 24 hours at 50% volume with lighting off and BassUp sound mode enabled. Other scenarios are 12 hours with lighting on and BassUp at 50% volume and 6 hours at 100% volume with lighting on and BassUp.14Maker product pageservice.soundcore.com/product-description/a08e200000K6u8tAABRead 15 October 2026Battery Life 24 H.16Maker product pageankerjapan.com/products/d5103Read 15 October 2026Normally up to 24 hours.21Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 2026Reviewer roughly confirmed 24 hours at about 50% volume with lights off and BassUp on, spread over several days. This is not a measured value.

14h1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026Up to 14 hours between charges. Actual runtime varies with use, settings and environmental conditions. Volume not stated.

Playback with battery extension (claimed)iTotal claimed runtime with the named battery extension mode enabled. Store the total, not only the extra hours. Keep sound and lighting restrictions in the source note.

40h7Maker product pageservice.soundcore.com/article-description/How-long-does-the-Boom-Go-3i-s-battery-last-when-playing-musicRead 15 October 2026Power-saving: up to 40 hours at 50% volume with lighting off and Eco mode enabled. Total runtime, not extra hours. The 22 hour Eco figure in the January announcement was replaced.16Maker product pageankerjapan.com/products/d5103Read 15 October 2026Up to 40 hours in Eco mode. Volume and use conditions affect it.

Not available

Battery energyiPublished battery pack energy. Do not calculate from an assumed voltage.

Not available

Not available

Battery capacityiPublished pack capacity at the voltage in battery_voltage_v. Do not substitute power-bank output capacity. A figure written per cell, such as 5000mAh*2, is not a pack capacity unless the maker states the pack figure.

4,800mAh4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Battery Capacity 4800 mAh. Voltage and Wh are not published.16Maker product pageankerjapan.com/products/d5103Read 15 October 20264800 mAh built-in battery.

2,100mAh2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026Built-in Li-ion rechargeable battery 2100 mAh. Pack voltage and energy are not published.

Nominal battery voltage

Not available

Not available

Battery chemistry

Lithium13Maker product pageservice.soundcore.com/article-description/Is-the-Boom-Go-3i-fireproofRead 15 October 2026Says the speaker has a built-in lithium battery. The cell type is not narrowed further.

Lithium-ion1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

User-replaceable batteryiBattery that the maker documents as replaceable by the user. Service replacement does not qualify.

No9Maker product pageservice.soundcore.com/article-description/Can-the-battery-for-the-Boom-Go-3i-be-replacedRead 15 October 2026Answer says the battery cannot be replaced.

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Full charge timeiTime from discharged to full under the maker conditions. Adapter rating and simultaneous use belong in source notes.

4h4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Charging Time 4 Hours.8Maker product pageservice.soundcore.com/article-description/What-is-the-charging-power-and-charging-time-for-the-Boom-Go-3iRead 15 October 2026About 4 hours to fully charge with a 5V/3A charger. Simultaneous playback is not stated.

3h2Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026About three hours from empty to full with a 10 W or higher charger. Adapter recommendation 5 V/2 A is not treated as speaker input.

Quick charge duration

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Playback after quick chargeiClaimed music playback after quick_charge_min of charging. Source conditions apply.

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Charging input ratingiPublished speaker input voltage and current. An adapter rating alone does not establish device input.

5 V DC, 3 A4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says Power Input 5V 3A. The guide recommends a charger with 0.05 W to 15 W output. That is an adapter recommendation and not a device maximum.8Maker product pageservice.soundcore.com/article-description/What-is-the-charging-power-and-charging-time-for-the-Boom-Go-3iRead 15 October 2026Recommends a charger rated up to 5V/3A.

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Max charging inputiPublished maximum charging input. USB audio power requirements and adapter output are separate.

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USB Power Delivery charging

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Charges other devices

Yes1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page says it doubles as a portable charger and charges an iPhone 17 from 0% to 40% in about 1 hour. No output wattage is published.4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Charging Other Devices section. Reverse charging does not work when the battery is below 10%.

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Max power-bank outputiPublished power delivered by the speaker to another device. Output voltage and current belong in the source note.

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Wireless chargingiThe speaker battery can be charged wirelessly. Wireless power output to another device is separate.

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Durability

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Dust and water ratingiExact published IP rating. Keep separate ratings, such as IP68 and IP69, as separate entries.

IP681Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page says certified IP68 for dust and waterproof protection.4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026Specifications table says IP68.14Maker product pageservice.soundcore.com/product-description/a08e200000K6u8tAABRead 15 October 2026Waterproof IP68.

IP671Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Floats

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Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Drop resistanceiExplicit maker claim or defined drop test. Do not infer from rugged wording.

Yes1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Page says tested to withstand drops of up to 1 meter (3.28 ft).11Maker product pageservice.soundcore.com/article-description/Does-the-Boom-Go-3i-have-drop-protectionRead 15 October 2026Drop protection up to 3.28 ft (1 meter).

Yes1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Drop test heightiMaker-published tested height. Surface and conditions belong in source notes.

1m1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Published 1 m (3.28 ft). Surface is not stated.11Maker product pageservice.soundcore.com/article-description/Does-the-Boom-Go-3i-have-drop-protectionRead 15 October 20261 m. Maker asks users not to run drop tests on purpose.

1.5m1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026Maker publishes a 1.5 m drop test, also described as five feet. Test surface not specified.

Carry featuresiPublished handles, straps, carabiners or wheels.

Dual-mode silicone mounting strap (attachment loop or carrying handle)1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026Dual-slot silicone strap works in clip mode and strap mode.

Bungee loop1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Measured

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Playback time (measured)iReviewer-measured playback per charge. Volume, lighting, sound mode, firmware and connection belong in the source note.

5.92h19Reviewsoundguys.com/soundcore-boom-go-3i-review-a-rugged-speaker-for-outdoor-adventures-154204Read 15 October 2026Reviewer ran 100% volume with lights on and BassUp enabled to match the maker's most demanding scenario. It lasted 5 hours 55 minutes (5.92 h). Maker claims 6 hours for that scenario. This is not the 50% volume test behind the 24 hour claim. Firmware and source device are not stated.

13h5Reviewrtings.com/speaker/reviews/ultimate-ears/wonderboom-4Read 8 October 2026Public review Outdoors verdict and Music pros report 13 hours battery life for the tested WONDERBOOM 4. Test bench 1.0.1. Numeric member-only tables were not read. Volume, EQ mode, codec, firmware and source device are not stated in the public prose.

Max sound pressure (measured)iReviewer-measured maximum SPL. Distance, test method and power source belong in source notes.

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Low-frequency extension (measured)iReviewer-measured low-frequency limit. Threshold and test method belong in source notes.

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High-frequency extension (measured)iReviewer-measured high-frequency limit. Threshold and test method belong in source notes.

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Audio latency (measured)iReviewer-measured source-to-speaker latency. Source device, app, codec, firmware and connection belong in source notes. App compensation may affect results.

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Full charge time (measured)iReviewer-measured time from empty to full. Power adapter and method belong in the source note.

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Dimensions and weight

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DimensionsiSpeaker body width, height and depth on explicitly identified axes. Unlabeled tuples do not establish axis meanings. Handle, strap and orientation conditions belong in the source note.

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WeightiSpeaker mass including its battery. Excludes packaging, charger and removable carry accessories unless the source states otherwise.

380g(13.4 oz)14Maker product pageservice.soundcore.com/product-description/a08e200000K6u8tAABRead 15 October 2026Maker support page says Product Weight 380g. Strap inclusion is not stated.16Maker product pageankerjapan.com/products/d5103Read 15 October 2026Japan page says about 380 g.

420g(14.8 oz)1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Body materials

Rubberized plastic, Silicone strap20Reviewheadphonecheck.com/test/soundcore-boom-go-3iRead 15 October 2026Impact-resistant plastic, silicone casing and a front grille.21Reviewchina-gadgets.de/soundcore-boom-go-3i-testRead 15 October 2026Back and narrow sides are slightly rubberized plastic. The strap is silicone.

Post-consumer recycled plastic, Recycled polyester fabric4Press releasenews.logitech.com/press-releases/news-details/2024/The-Rugged-Ultimate-Ears-EVERBOOM-Superior-Sound-That-Is-Waterproof-Dustproof-and-Floatable/default.aspxRead 8 October 2026WONDERBOOM 4 plastic components minimum 31% PCR by weight. Fabric is 100% PCR polyester. Packaging excluded.

Certifications

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FCC IDs

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Other certifications

EU Declaration of Conformity (Radio Equipment Directive 2014/53/EU)17Maker spec sheet (PDF)salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000036183/en_US/000036183.pdfRead 15 October 2026Declaration to Radio Equipment Directive 2014/53/EU, RoHS and battery regulation. Dated 2026-03-18. No FCC ID is printed in the maker documents.

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In the box

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In the box

Boom Go 3i speaker, USB-C to USB-C charging cable, Quick Start Guide12Maker product pageservice.soundcore.com/article-description/What-s-in-the-package-for-the-Boom-Go-3iRead 15 October 2026Speaker, Quick Start Guide and USB-C charging cable. No charger.

WONDERBOOM 4, Bungee loop (attached), Quick start guide (printed inside box)1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026US product page embedded Package Contents. No USB-C cable included. Support text generically says cable included and conflicts with this reference package.

Links

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Product page

us.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-sound1Maker product pageus.soundcore.com/products/d5103-boom-go-3i-portable-speaker-for-powerful-soundRead 15 October 2026

www.ultimateears.com/en-us/shop/p/wonderboom-41Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026

Spec sheet

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support.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-42Maker product pagesupport.logi.com/hc/en-us/articles/17139136148375-Specification-WONDERBOOM-4Read 8 October 2026

Manual

salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdf4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033536/en_US/000033536.pdfRead 15 October 2026English user guide D5103, created 2026-06-02 on the Soundcore support page. The 2026-02 version has no Dual Connections text.

support.logi.com/hc/en-us/articles/17139116395031-Getting-Started-UE-WONDERBOOM-43Owner's manualsupport.logi.com/hc/en-us/articles/17139116395031-Getting-Started-UE-WONDERBOOM-4Read 8 October 2026Maker online getting-started manual for exact WONDERBOOM 4.

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.

1.5years15Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000033526/en_US/000033526.pdfRead 15 October 2026Multi-language Quick Start Guide D5103 states an 18-month limited warranty, converted to 1.5 years. Statutory consumer rights are excluded.

2years1Maker product pageultimateears.com/en-us/shop/p/wonderboom-4Read 8 October 2026US page embedded specs and compatibility: 2-Year Limited Hardware Warranty.

Both are also in the API. Back to all wireless speakers.