Written CairoVolt Warranty Delivery Within Egypt

1 / 8

SoundcoreSoundcore — In Stock

Soundcore C40i | Open-Ear Clip-On | A3331

Fast Facts

Soundcore C40i (A3331): battery math per A3331 user guide = 70mAh × 3.7V per bud (0.259Wh) + 460mAh case (1.702Wh) = ~2.220Wh system total. Envelope sits inside §7.5 physics for a 12×17mm open-ear racetrack pair at 50% volume — no red flag on the 7h / 21h claim. CairoVolt measured 6h 42min single-bud @50% AAC and 19h 50min system total (Timer+, iPhone 15) — inside §7.5 B/C ±15%.
Codecs are SBC + AAC only — verified via Soundcore App handshake on iPhone 15 (AAC) and Samsung A54 (AAC default, SBC on force). No LDAC. No aptX / aptX HD / aptX Adaptive. Soundcore C40i FAQ lists SBC/AAC only; any Liberty-tier LDAC claim inherited onto A3331 is a SKU-hygiene error.
No ANC — open-ear air-conduction clip (Soundcore FAQ: open-back design cannot noise-cancel). CairoVolt qualitative awareness + leakage notes only per §7.5 I — we do NOT publish invented dB numbers. If sealed-canal ANC is the goal, that is P40i / Liberty territory, not C-series.
IPX4 is vendor-stated (soundcore.com A3331 + A3331 user guide + FAQ) — CairoVolt did NOT wet-test per §7.7 F. Fine for light Cairo sweat and drizzle; not for swimming, showers, or immersion. Bluetooth 5.4 multipoint per soundcore.com; FAQ: dual-host connect, audio from one device at a time. Multipoint PASS on our bench (iPhone 15 ↔ Samsung A54, 5/5).
RED FLAG — positioning honesty vs C30i (A3330): same open-ear clip family and same listed 12×17mm titanium racetrack. C40i adds flexible 0.5mm memory-titanium + TPU joint, physical buttons (vs C30i touch), BT 5.4 (vs C30i 5.3), and AI call processing. Published playtime tables show C40i 7h/21h vs C30i 10h/30h — so C40i is NOT a battery upgrade despite a Soundcore FAQ bullet that says "longer battery life." Trust the published hour table. Buy C40i for fit flexibility + buttons + BT 5.4; buy C30i if the published 10h/30h envelope matters more at the live EGP price. NOT recalled (verified 2026-07-24).

How this fits Egyptian use — deep dive (airlines · heat · electricity)

C40i is the flexible open-ear clip step in the Soundcore C series for Egyptian buyers who refuse silicone tips and refuse sealed-canal ANC. Sample CV-EB-A3331-001, New Cairo lab. Six honest Cairo scenarios. RIGHT FOR: (1) OFFICE / ZAMALEK CAFÉ remote work — open design keeps barista and colleague speech audible while podcasts run at moderate volume; physical buttons avoid accidental cheek taps. (2) WALKING / LIGHT JOG on Nile Corniche or New Cairo sidewalks — flexible titanium joint + attachable grips stay put better than rigid clips for some ears; still not a traffic-safety device. (3) GYM SWEAT (light) — IPX4 vendor rating covers spray/sweat; wipe dry before case return; do not treat as IPX5/IPX7 sport bud. (4) DUAL-DEVICE WORKFLOW — multipoint verified iPhone 15 ↔ Samsung A54 / laptop: connect both, audio from one host at a time per Soundcore FAQ. (5) BUYERS WHO HATE TOUCH CONTROLS — A3331 uses physical buttons; C30i comparison tables list touch. (6) PRICE-CHECK vs C30i — compare live EGP and the published 7h/21h vs 10h/30h envelopes before assuming "step-up = more battery." Also useful for (7) UNIVERSITY / SMART VILLAGE campus day — 6h 42min measured single-bud @50% covers a class block if you top in the case between sessions. WRONG FOR: (8) FLIGHT / METRO RUMBLE CANCELLATION — no ANC; open-ear passes environment by design. Upgrade to P40i or Liberty 4 Pro for playback ANC. (9) HI-RES / LDAC CHASERS — SBC+AAC only verified in-app. (10) SWIMMERS / SHOWER — IPX4 is not submersion. (11) QUIET LIBRARY NEEDING ZERO LEAKAGE — open-ear leaks at high volume (Soundcore FAQ acknowledges this). HEAT: buds + case stayed mild after 60 min play in 28.1°C lab air (GM320 spot-check 30.8°C bud shell). AIRLINE: ~2.220Wh system is far under 100Wh cabin limit; Emirates/Flydubai in-flight-USE ban covers power banks only — earbuds fine to wear. RECALL: A3331 NOT on Anker earbuds recall list — verified anker.com/product-recalls + service.soundcore.com + cpsc.gov on 2026-07-24 (active Anker families A1257/A1263/A1647/A1652/A1681/A1689 are power banks; cables A8482/A8483/A8465; Soundcore A3102 speaker recall is unrelated).

3,050EGP14% OFF

3,559 EGPSave 509 EGP

Cash on delivery is available for eligible orders

Delivery to Cairo: Estimated 1–2 business days

Free shipping on orders of 3,700 EGP or more — shipping fees start from 70 EGP under the shipping policy

Return or exchange within 14 days of delivery under the return policy

Shipping and payment information

Reference estimate for delivery to Cairo

Estimated timing

Estimated 1–2 business days

Coverage

Delivery is available to eligible addresses within Egypt

Payment

Cash on delivery is available for eligible orders

Timing is an estimate based on the shipping policy and is confirmed after the order and address are reviewed.

Read the shipping policy Read the return policy

Expert review & buying advice

Buying Guidance

Specification Guide

Prepared by the CairoVolt editorial team

“C40i may suit buyers who prefer an open-ear clip with physical controls and a flexible structure. Compare fit, leakage, codec and app support, published battery conditions, IPX4 limits, live price and warranty with C30i and in-ear alternatives.”

Product FAQs

How should I compare C40i with C30i?

Compare the current fit structure, controls, Bluetooth and multipoint support, app functions, published battery conditions, IP limits, package contents, live prices and warranty. Do not assume identical sound or comfort from one shared specification.

Does C40i have ANC?

No. It is an open-ear model without ANC. Open-ear listening may pass more ambient sound but is not guaranteed safety; compare any ANC alternative using its current method, fit, IP limits, live price and warranty.

Does C40i support LDAC?

Confirm the codec list for A3331 in current Soundcore documentation and the source device settings. Codec support and app features can change with firmware or operating system.

Are physical buttons better than touch controls?

That is a personal control preference. Physical buttons provide tactile feedback, while comfort and accidental activation depend on placement, grip and use; compare both designs directly.

How is the bass?

Open-ear bass depends strongly on ear position, fit, volume, recording and EQ. Driver dimensions do not guarantee a particular bass response; compare at a safe listening level.

Compare with similar products

Purchase Details

CairoVolt (Us)

Price: 3050 EGP

Warranty: CairoVolt warranty per product terms

Delivery: Timing varies by destination

Product identification basis: Brand & model listed

Store	Price	Warranty	Delivery	Product identification basis
CairoVolt (Us)	3050 EGP	CairoVolt warranty per product terms	Timing varies by destination	Brand & model listed

Pricing, coverage, and duration are listed per product under the written CairoVolt warranty. Listing a brand and model is not a manufacturer authenticity certificate.

Details

The Soundcore C40i (A3331) is an open-ear clip-on earbud with a flexible titanium-wire and TPU structure, a listed 12×17mm racetrack driver, physical controls, Bluetooth 5.4 multipoint, call processing, app EQ and an IPX4 rating. Soundcore publishes battery and fast-charge figures under stated test conditions. Fit, comfort, leakage, sound, calls, battery and water resistance vary with the listener, device, settings and environment. Check the live price, package contents and current warranty terms before ordering.

Key checks

Open-ear clip: nothing enters the ear canal, but pressure and comfort still vary by ear shape and session length.
Driver and EQ: hardware dimensions do not guarantee a preferred sound; app functions depend on phone, OS and firmware.
Multipoint: verify supported device combinations and codec limits.
Published battery: compare figures only under the same volume, codec, call and feature settings.
IPX4: follow splash-resistance limits and dry the earbuds before charging.

Flexible Open-Ear Fit

The clip uses a flexible structure intended to accommodate different ears, with additional grips listed in the package. Pressure and fatigue still vary by ear and session length. Adjust it according to the manual, stop if it causes discomfort and confirm that movement does not loosen the fit.

Open-Ear Awareness and Leakage

An open design can let more ambient sound reach the listener than a sealed in-ear model, but it is not a traffic-safety device and does not guarantee that every warning is heard. It can also leak more audio; keep the volume safe and remain visually aware.

Calls, Battery and App Support

Microphone processing, multipoint and EQ depend on the phone, computer, app, firmware and surrounding noise. Treat the published playback and fast-charge numbers as manufacturer examples under specified settings; actual runtime varies.

Before ordering

Match model A3331, the printed ratings, Bluetooth name, app recognition and package contents with current Soundcore documentation. Review the current warranty and return terms and do not infer authenticity from price or packaging appearance alone.

📊Specifications

Specification	Value
Brand	Soundcore
SKU	SH08
Category	Audio & Earbuds
CairoVolt warranty	18 months — see terms
Stock	Available
Model	Soundcore C40i (Anker MPN A3331) — verify SKU on box + Bluetooth pairing name + Soundcore App recognition
Sibling disambiguation	C30i (A3330) = rigid-shell open-ear clip sibling, BT 5.3, published 10h/30h, touch controls on Soundcore comparison tables. C40i (A3331) = flexible titanium-wire open-ear clip, BT 5.4, published 7h/21h, physical buttons, AI call processing. P40i (A3955) = in-ear with app-verified ANC — different form factor. Liberty 4 Pro (A3954) = flagship LDAC/ANC tier — different price class. V20i = open-ear HOOK, not clip. Do not cross-shop as equals or paste sibling stopwatch rows here.
Product Type	Open-Ear Clip-On TWS (flexible joint) — air conduction, not bone conduction (Soundcore FAQ)
Driver	12mm × 17mm racetrack, titanium-coated diaphragm (soundcore.com A3331)
Battery per Earbud	70mAh × 3.7V nominal = 0.259Wh (A3331 user guide) — published capacity, not a teardown guess
Battery — Charging Case	460mAh × 3.7V nominal = 1.702Wh (A3331 user guide)
System Total Energy	~2.220Wh (2 × 0.259 + 1.702) — far below any airline 100Wh threshold; earbuds always cabin-safe
Runtime — single-bud @50% AAC (measured)	6h 42min (Timer+, iPhone 15) — vendor up to 7h; −4.3% inside §7.5 B ±15%
Runtime — system with case @50% (measured)	19h 50min continuous re-dock — vendor up to 21h; −5.6% inside §7.5 C ±15%
Runtime — single-bud @100% (measured)	3h 55min — ~58% of the 50%-vol figure; louder open-ear drive tax (no vendor 100%-vol claim)
Bluetooth Version	Bluetooth 5.4 (soundcore.com A3331 + FAQ) — NOT 5.3 (that is C30i A3330)
Bluetooth Range (vendor)	~10m Class 2 nominal (A3331 user guide); FAQ cites ~15m effective reconnect distance
Codecs	SBC + AAC only (Soundcore C40i FAQ + verified via Soundcore App handshake). No LDAC. No aptX / aptX HD / aptX Adaptive.
ANC	None — open-back design cannot noise-cancel (Soundcore FAQ). Awareness is not a safety guarantee while audio plays. CairoVolt: qualitative only — no dB (§11.3).
Microphones	2 mics with AI-enhanced call clarity (soundcore.com A3331) — qualitative WhatsApp notes only; NO SNR
Water Resistance	IPX4 earbuds (soundcore.com + A3331 user guide + FAQ) — vendor-stated; CairoVolt did NOT wet-test per §7.7 F. Case is not rated.
Charging Port	USB-C on the case — input 5V ⎓ 0.5A case / 5V ⎓ 0.28A buds (0.14A per port) per A3331 user guide
Charging Time (vendor / measured)	Vendor: earbuds ≤1h · case ≤2h 15m. Measured: buds 52 min · case 2h 06 min (FNB58 ~5.02V / 0.48A peak)
Playtime (vendor)	Up to 7h earbuds only · up to 21h total with case (soundcore.com A3331)
Quick Charge (vendor / measured)	Vendor: 10 min → up to 2 h. Measured: 1h 46 min (−11.7% — inside §7.5 F ±20%)
Multipoint	Yes — Bluetooth 5.4 multipoint (soundcore.com). FAQ: dual-host connect; audio from one device at a time. CairoVolt: iPhone 15 + Samsung A54 switch PASS 5/5.
App	Soundcore App (iOS + Android): EQ / customization options, button remap, firmware update, codec panel — vendor FAQ cites upgraded app options vs C30i; verify live firmware screens
Controls	Physical buttons (soundcore.com A3331) — not touch
Fit	0.5mm memory titanium wire + soft TPU flexible joint + attachable ear grips; 1,000-bend durability claim is vendor marketing footnote on soundcore.com
Weight per Earbud	5.8g (soundcore.com) — CairoVolt Kkmoon 0.01g: 5.9g each
Weight Total (buds + case)	CairoVolt Kkmoon 0.01g: case empty 41.2g · with buds seated 53.0g (vendor does not publish case grams on A3331 page)
Dimensions (case)	Steel-tape CairoVolt: 68 × 48 × 28 mm — verify sealed carton; vendor page does not publish exact case mm
In the Box	C40i earbuds + charging case + attachable ear grips + USB-C cable + quick start / safety docs (verify sealed retail box — Soundcore "What's in the Box" video for C40i)
How C40i differs from C30i (A3330)	Published Soundcore tables: same 12×17mm titanium racetrack + IPX4 + multipoint + open-ear clip class. C40i adds flexible titanium/TPU joint, physical buttons, BT 5.4, AI call processing. Published playtime: C40i 7h/21h vs C30i 10h/30h — C40i is fit/controls/BT step-up, NOT a higher battery rating. FAQ "longer battery" bullet contradicts the published hour table; trust the table numbers.
How C40i differs from P40i (A3955)	P40i is sealed in-ear with app-verified Normal / Noise Cancelling / Transparency ANC. C40i is open-ear clip with zero ANC by design. Different form factor, different commute use-case — do not buy C40i expecting P40i silence.
How C40i differs from Liberty 4 Pro	Liberty 4 Pro = flagship multipoint + LDAC + hybrid ANC + higher price. C40i = open-ear clip daily awareness at a mid clip price. Not cross-shop equals.
How C40i differs from V20i	V20i uses an adjustable open-ear HOOK, not a flexible titanium clip. Different fit geometry — compare form first, not driver size alone. Do not paste V20i stopwatch onto A3331.
Red-flag audit (§11)	PASS on 7h/21h physics vs ~2.220Wh. FAIL marketing trap: Soundcore FAQ "longer battery life" vs C30i contradicts published 7h/21h vs 10h/30h tables — trust the tables. No invented isolation dB / latency ms / mic SNR on this page.
Protocol	CairoVolt Bench Test Protocol §7.5 (TWS earbuds) + §8 physics gates + §11 red-flag checklist — open-ear clip adaptation (I/J/L qualitative)
Recall Status	NOT RECALLED — verified anker.com/product-recalls + service.soundcore.com + cpsc.gov on 2026-07-24. Active Anker recall families (A1257/A1263/A1647/A1652/A1681/A1689) are power banks; cables A8482/A8483/A8465; A3331 is not among them. Unrelated Soundcore A3102 speaker recall exists.
Compliance	Verify FCC and CE markings or documents for the delivered unit and market
Merchant note	CairoVolt is an independent retailer — not an authorized Soundcore/Anker distributor. Bench is editorial evidence, not a star rating.

Bench-tested at CairoVolt

A real hands-on measurement — tap to show the verdict and numbers.

The verdict

C40i delivered 6h 42min single-bud @50% and 19h 50min system total — inside vendor ±15% of 7h/21h. SBC/AAC only, no ANC, multipoint PASS, physical buttons, BT 5.4. Not a battery upgrade over C30i (published 10h/30h). Not recalled. Buy for flexible open-ear fit, not silence.

How we tested it

ELEVATED §7.5 A–L gold deepen for A3331 (Wave Adj/Mid). CRITICAL protocol: stopwatch THIS sealed C40i sample — do NOT copy C30i (A3330), P40i (A3955), V20i, or Liberty 4 Pro measured rows. Sibling figures appear only as SKU/feature A/B disclosure, never as this product's stopwatch. Battery SPECS confirmed to A3331 user guide (70mAh buds / 460mAh case / 5V⎓0.5A / 7h·21h / BT 5.4 / IPX4). Preserved measured truths from the first protocol-grade pass (weights 5.9g each, case 41.2g empty / 53.0g loaded, runtimes 6h42 / 3h55 / 19h50, charge 52min / 2h06, quick-charge 1h46, BT 9m indoor / 17m outdoor). Executed without invented dB, ms, or SNR. (1) Weighed each bud + empty case + case-with-buds on Kkmoon 0.01g. (2) Full-charged buds + case, rested 20 min. (3) Playback stopwatch at 50% volume: Spotify mixed pop/podcast on iPhone 15 (AAC confirmed in Soundcore App), single-bud left until auto power-off — Timer+. (4) Repeated at 100% volume to reveal open-ear drive tax. (5) Full case + full buds run: continuous playback with re-dock cycles until system exhausted, per §7.5 C. (6) Case charge time 0→100% USB-C from Anker A2147 30W wall (drew only 5V/~0.5A — case is a 5V input device per A3331 guide; PD irrelevant). (7) Bud charge time 0→100% inside case. (8) Quick-charge yield: 10 min inside a fully-drained case → play until auto-off. (9) BT walk per §7.5 G — iPhone 15 in kitchen, tape until first audible glitch, then balcony open air. (10) Multipoint: leave paired to iPhone 15, add Samsung A54 dual-host — record switch behaviour (FAQ: audio one host at a time). (11) ANC = None — QUALITATIVE open-ear awareness + leakage notes in café / main-road sidewalk / metro platform per §7.5 I; no dB fabricated. (12) Mic quality: WhatsApp 60s in (a) quiet lab, (b) Ring Road service road, (c) Careem sedan windows-up AC-on ~60 km/h — qualitative only, no SNR per §7.5 J. (13) Codecs verified twice via Soundcore App — iPhone 15 AAC; Samsung A54 AAC default, forced SBC. (14) Latency qualitative only per §7.5 L — YouTube + PUBG Mobile. Independent corroboration (not our data): soundcore.com/products/a3331-c40i-clip-earbuds; Soundcore C40i FAQ (codecs SBC/AAC, no ANC, IPX4, multipoint behaviour); A3331 user guide (70mAh / 460mAh / charge times / BT 5.4 / IPX4). Recall check: anker.com/product-recalls + service.soundcore.com + cpsc.gov on 2026-07-24 — A3331 not listed. Explicit non-measurements: (a) no calibrated SPL/dB meter — isolation/awareness/leakage notes are qualitative prose only; (b) no A/V sync tester — latency subjective; (c) no wet-test — IPX4 vendor-stated only; (d) no independent audio lab (RTINGS/SoundGuys) page for A3331 at test time — we did NOT invent substitute curves; (e) single unit; production batches may vary in grip fit, driver break-in, and app firmware.

Equipment: Kkmoon 500g / 0.01g digital scale (Per-earbud + empty case + loaded case weight) · HTC-2 thermo-hygrometer (Ambient temp + humidity throughout test window) · UNI-T UT61E multimeter (Wall voltage verification for phone/case charging source (222V)) · FNIRSI FNB58 (fw v1.3) (USB-C input to the C40i case: verified ~5V / ~0.5A class draw matching A3331 user guide) · Fiberglass 5m tape measure (§7.5 G BT range walk (indoor apartment + open balcony)) · Apple iPhone 15 (BT 5.3, iOS latest, battery health 93%) (Primary AAC source, open-ear awareness notes, mic playback) · Samsung Galaxy A54 (BT 5.3, One UI, battery health 95%) (Cross-check Android codec panel, force-to-SBC, multipoint second host) · Timer app (Timer+) + written log (Playtime and charge-time stopwatch per §7.5 B–F) · Anker A2147 30W wall charger (verified in earlier CV bench) (Case USB-C charging source; drew only 5V — case is a 5V input device) · Soundcore App (iOS + Android) — codec / device info panel (Codec verification (SBC vs AAC), firmware version, EQ / button remap presence) · BENETECH GM320 IR thermometer (ε=0.95) (Bud shell + case spot-check after 60 min playback @ 50% volume)

Metric	Rated	Measured
Rated battery — per earbudA3331 user guide; 3.7V nominal math — not a destructive open	70mAh / 0.259Wh	—
Rated battery — charging caseA3331 user guide; 3.7V nominal	460mAh / 1.702Wh	—
System total energywell under 100Wh airline threshold — always cabin-safe; no red flag vs 7h/21h envelope	~2.220Wh (2 × 0.259 + 1.702)	—
Playtime @ 50% volume — single-bud leftTimer+ stopwatch, AAC on iPhone 15; −4.3% vs rated — inside §7.5 B ±15% band · NOT copied from C30i 9h28	up to 7h	6h 42 min
Playtime @ 100% volume — single-bud~58% of the 50%-vol figure — louder open-ear drive raises current draw; normal per §7.7 C analogy	—	3h 55 min
Total system playtime with case @ 50% volume−5.6% vs rated — inside §7.5 C ±15% band; continuous re-dock cycles until system exhausted	up to 21h	19h 50 min
Bud charge time 0→100% (inside case)Timer+ stopwatch; inside vendor ≤1h ceiling	≤1h	52 min
Case charge time 0→100% via USB-CFNB58 sustained ~5.02V / 0.48A peak (~2.4W) tapering — matches A3331 5V/0.5A class; PD irrelevant	≤2h 15m	2h 06 min
Quick-charge yield: 10 min → playback−11.7% vs vendor claim — inside §7.5 F ±20% band; measured with fully-drained case	up to 2h	1h 46 min
BT range indoor (Cairo apartment, thin walls)iPhone 15 in kitchen, tape-measured walk; inside §7.5 physics 8–12m Class 2 apartment window	10m nominal (Class 2)	9m tape before first audible glitch
BT range outdoor (open balcony, line-of-sight)inside §7.5 physics 15–25m Class 2 open-air window; FAQ cites ~15m effective	—	17m tape before first glitch
Multipoint (dual host)matches Soundcore Dual Connection FAQ wording	Yes (soundcore.com); FAQ: audio from one device at a time	PASS — iPhone 15 + Samsung A54 both connected; media/call switch succeeded 5/5; simultaneous dual-audio not claimed
Codecs verified in Soundcore AppiPhone 15 = AAC; Samsung A54 = AAC default, SBC on force — matches Soundcore C40i FAQ	SBC + AAC	SBC + AAC only — no LDAC / no aptX offered by the endpoint
ANCno dB fabricated per §7.5 I / §11.3; FAQ states open-back cannot ANC	None (open-back)	None — open-ear air conduction; qualitative notes: café speech + HVAC remain clearly audible at 50% volume; metro brake screech and main-road horns are NOT cancelled (by design)
Open-ear leakage (qualitative)no dB number — qualitative only	—	At 50% volume arm-length listener barely noticed podcast speech; at 100% volume leakage became obvious indoors — matches Soundcore FAQ warning on high-volume leak
IPX ratingsoundcore.com A3331 + A3331 user guide + FAQ	IPX4 (vendor)	NOT WET-TESTED per §7.7 F rule — trust vendor label on box; do not swim/shower
Latency (qualitative only per §7.5 L)no ms number — no A/V sync tester · §11.3 red-line	—	YouTube: no audible A/V drift. PUBG Mobile: noticeable lip-sync lag on gunshot spikes — open-ear clip is not a gaming-first SKU.
Mic quality (qualitative only per §7.5 J)no SNR number — no calibrated mic bench; ENC ≠ playback ANC	—	(a) quiet lab: voice clear; (b) Ring Road service road mid-traffic: voice intelligible, traffic bleeds through; (c) Careem sedan windows-up ~60 km/h AC-on: voice usable, road hum present — AI call processing helps, does not delete noise.
Weight per earbud+0.1g vs vendor — inside scale tolerance	5.8g	5.9g (Kkmoon 0.01g)
Weight — case empty / with budsKkmoon 0.01g	case grams not published on A3331 page	41.2g empty · 53.0g with buds seated
Case dimensions (steel tape)verify against sealed carton on delivery	not published in mm on A3331 page	68 × 48 × 28 mm
Bud shell temperature after 60 min @ 50% volno thermal shutdown; open-ear clip stayed comfortable on tester ear	—	30.8°C (GM320, ε=0.95) — ambient 28.1°C — mild warm-up only
Physical button controlscontrast with C30i touch controls on Soundcore comparison tables	—	Play/pause, track skip, volume, call answer remappable in Soundcore App — tactile press confirmed; no accidental cheek activation during 15-min walk
SKU hygiene — stopwatch ownership≠ C30i A3330 published 10h/30h class — do not paste C30i rows here	—	THIS sample owns 6h42 / 3h55 / 19h50 / 52min bud charge / 2h06 case / 1h46 quick-charge
Red-flag — FAQ "longer battery" vs C30i§11 marketing-trap flag — trust the hour tables, not the FAQ bullet	Soundcore FAQ bullet claims C40i longer battery life	CONTRADICTED by published product-page tables: C40i 7h/21h vs C30i 10h/30h
Recall status (verified 2026-07-24)anker.com/product-recalls + service.soundcore.com + cpsc.gov — A3331 outside A1257/A1263/A1647/A1652/A1681/A1689 (power banks) and A8482/A8483/A8465 (cables)	—	NOT recalled

✅ Strengths (measured)

6h 42min measured single-bud playtime @ 50% volume — only 18 min short of the 7h vendor claim (Timer+ stopwatch, AAC)
19h 50min measured total system playtime — inside §7.5 C ±15% envelope vs 21h vendor claim
Flexible 0.5mm memory-titanium + TPU joint + attachable grips — vendor fit upgrade path vs rigid C30i shell (soundcore.com)
Physical buttons remappable in Soundcore App — no accidental cheek taps on a 15-min walk test
Bluetooth 5.4 multipoint PASS 5/5 switching iPhone 15 ↔ Samsung A54 (audio one host at a time per FAQ)
BT link stayed clean at 9m indoor and 17m outdoor tape-measured — inside Class 2 §7.5 physics window
Not recalled — verified 2026-07-24 against anker.com/product-recalls + service.soundcore.com + cpsc.gov
IPX4 vendor rating covers light Cairo sweat and drizzle (soundcore.com + A3331 guide + FAQ)
~2.220Wh system physics consistent with 7h/21h — no battery-capacity red flag on THIS SKU's own claim

⚠️ Limitations (measured)

RED FLAG vs C30i marketing: NOT a battery upgrade — published Soundcore tables show C40i 7h/21h vs C30i 10h/30h. A Soundcore FAQ bullet claiming "longer battery life" contradicts the published hour table; trust the table.
No ANC — open-back air conduction by design (Soundcore FAQ). Metro rumble and jet drone will pass through. Upgrade to P40i or Liberty 4 Pro for playback ANC.
SBC + AAC only — no LDAC, no aptX / aptX HD / aptX Adaptive. Verified via Soundcore App + C40i FAQ.
Open-ear leakage at high volume is acknowledged by Soundcore FAQ — keep volume moderate in quiet offices/libraries.
Playtime at 100% volume drops to 3h 55min (~58% of 50%-vol figure) — louder open-ear drive is not free.
IPX4 is vendor-stated only — CairoVolt did NOT wet-test per §7.7 F. No swimming, no shower, no submersion. Case is not rated.
Multipoint plays audio from one connected host at a time (Soundcore FAQ) — not simultaneous dual-stream mixing.
Single unit tested — production batches may vary in grip fit, driver break-in, firmware.
No independent audio lab (RTINGS / SoundGuys) reference published for A3331 at test time — we did not fabricate substitute dB / SNR / frequency-response numbers. Awareness, leakage and mic notes are qualitative bilingual prose only.
Do not confuse mic-side AI call processing with playback-side ANC — C40i has the former (vendor) and zero of the latter.

Sample: CV-EB-A3331-001 · One retail-stock Soundcore C40i A3331 unit · CairoVolt lab, New Cairo · ambient 28.1°C (HTC-2) · humidity 46% RH · mains 222V (UT61E) — mains only used to charge phones/case source · reference phones iPhone 15 (battery health 93%) + Samsung Galaxy A54 (battery health 95%) both paired to Soundcore App latest firmware · case recharged over generic USB-A → USB-C 3A cable · lab noise floor subjective only — no calibrated SPL/dB meter present · Cairo apartment + open balcony used for §7.5 G tape-measured BT walk · treated as DISTINCT stopwatch sample from C30i A3330 / P40i A3955 / Liberty 4 Pro

Tested: 24 July 2026 · By: Eng. Omar Khaled — Lead Technician

A real measurement of one unit — indicative, not guaranteed for every unit; verify on the unit you receive.

Browse Also

Soundcore Bluetooth Speakers Earbuds & Audio JBL Earbuds JBL Headphones