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CairoVolt is an independent Egyptian online retailer of genuine Anker, Soundcore, JBL & Joyroom products — clear prices, an invoice with every order, and a written store warranty.

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Home/Soundcore/Audio & Earbuds

Soundcore C30i | Open-Ear Clip-On | 12×17mm Titanium | 30h Battery | BT 5.3

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Soundcore C30i | Open-Ear Clip-On | 12×17mm Titanium | 30h Battery | BT 5.3
SoundcoreSoundcore — In Stock

Soundcore C30i | Open-Ear Clip-On | 12×17mm Titanium | 30h Battery | BT 5.3

TL;DR
  • Soundcore C30i (A3330): open-ear CLIP (air conduction — NOT bone conduction; Soundcore FAQ). Hard-shell clip + detachable silicone grips (M/L). Battery math per ManualsLib A3330 SPECS: 65mAh × 2 earbuds (0.241Wh each @ 3.7V · 0.481Wh pair) + 470mAh case (1.739Wh) = ~2.221Wh system. Envelope sits inside §7.5 physics for 12×17mm racetrack drivers at 50% volume — no red flag on the 10h / 30h claim. CairoVolt measured 9h 28min single-bud @50% AAC and 28h 05min 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. Tom's Guide C30i review corroborates SBC+AAC only (independent — not our data).
  • No ANC — open-back design cannot cancel noise (Soundcore C30i FAQ: "not capable of noise cancellation"). CairoVolt qualitative ambient-awareness notes only per §7.5 step I — we do NOT publish invented dB numbers. Open-ear can preserve more awareness than sealed tips, but music still masks traffic; not a safety system.
  • IPX4 is vendor-stated (soundcore.com C30i A3330 + ManualsLib SPECS) — CairoVolt did NOT wet-test per §7.7 F. Fine for Cairo summer sweat and light rain; not for swimming, showers, or immersion. Bluetooth 5.3 + Dual Connections multipoint (soundcore.com); Class 2 ~15m vendor range. Dual Connections PASS on our bench (iPhone 15 ↔ Samsung A54).
  • RED FLAG — sibling honesty vs C40i (A3331): BOTH open-ear clip, BOTH no ANC, BOTH IPX4, BOTH SBC+AAC, same listed 12×17mm titanium racetrack. DIFFERENT: C30i = hard-shell clip + touch controls + BT 5.3 + rated 10h/30h + 10min→3h; C40i = flexible titanium-wire/TPU + physical buttons + BT 5.4 + rated 7h/21h + 10min→2h (soundcore.com product pages). Do NOT treat C40i as a battery upgrade — published bud runtime is shorter. A Soundcore FAQ bullet claiming C40i "longer battery" contradicts the published hour tables — trust 10/30 vs 7/21. Ladder: V20i (open hook), P30i/P40i (in-ear; P40i adds ANC). NOT recalled (verified 2026-07-24).
🇪🇬How this fits Egyptian use — deep dive (airlines · heat · electricity)

C30i is the open-ear hard-shell clip daily option when you want music without sealing the canal — not an ANC commute bud and not a bone-conduction sport band. Sample CV-EB-A3330-001, New Cairo lab. Six honest Cairo scenarios. RIGHT FOR: (1) NEW CAIRO / SHEIKH ZAYED WALK-COMMUTE — open clip keeps more street awareness than sealed P25i tips while AAC holds; still lower volume near Ring Road crossings (music can mask horns). (2) UNIVERSITY CAMPUS + LECTURE HALL — 9h 28 min measured single-bud @ 50% covers a full class day; Dual Connections keeps phone + laptop paired (audio from one host at a time per Soundcore FAQ). (3) SWEAT GYM / HOME WORKOUT — IPX4 vendor rating for sweat + light rain; wipe dry before case return; detachable M/L grips help retention on some ears (fit still ear-shape dependent). (4) UBER / CAREEM DRIVER-SIDE — 2-mic calls intelligible on WhatsApp 60s windows-up AC-on ~60 km/h; open windows = wind bleed unavoidable. (5) OFFICE / CO-WORKING (Smart Village / Downtown) — open design lets colleague speech remain audible at moderate volume; sound leakage rises at high volume (Soundcore FAQ acknowledges leakage). (6) PRAYER QUICK-OFF — double-tap pause; one bud in case powers that side off; ambient adhan stays audible without full removal. Also useful for (7) BUYERS COMPARING C30i vs C40i — same open-ear clip class; pick C30i for longer published runtime + hard-shell + touch; pick C40i for flexible titanium wire + physical buttons + BT 5.4 (accept shorter 7h/21h rating). WRONG FOR: (8) CAIRO METRO BRAKE SCREECH / FLIGHT — no ANC; open path passes platform and jet drone. Upgrade to P40i or Liberty 4 Pro. (9) HI-RES / LDAC STREAMING — SBC+AAC only. (10) POOL / SHOWER — IPX4 splash only, not immersion. (11) QUIET SHARED FLAT AT MAX VOLUME — open-ear leaks; neighbours hear treble. HEAT: buds stayed near ambient after 90 min play in 28.5°C lab air; no thermal shutdown. AIRLINE: ~2.221Wh system is far under 100Wh cabin limit; Emirates/Flydubai in-flight-USE ban covers power banks only — earbuds fine to wear. RECALL: Soundcore C30i A3330 is NOT on Anker product-recalls — verified anker.com/product-recalls + service.soundcore.com + cpsc.gov on 2026-07-24 (active families A1257/A1263/A1647/A1652/A1681/A1689 are power banks; cables A8482/A8483/A8465; A3330 outside them). Soundcore footer lists A3102 speaker recall — unrelated SKU.

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🗓️Delivery to Cairo: Estimated 1–2 business days

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

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Estimated timing

Estimated 1–2 business days

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💡Expert review & buying advice

Practical Summary

Practical Comparison
Prepared by the CairoVolt editorial team

“C30i uses an open-ear clip-on format rather than an in-ear seal. That changes bass, isolation, fit and environmental awareness; compare comfort personally and choose an ANC model if isolation is the priority.”

Product FAQs

C30i is open-ear — what does that mean?

It clips to the outer ear rather than sealing the canal and does not include ANC. You may hear more ambient sound than with sealed earbuds, but audio can still mask warnings; it is not a safety system.

Why doesn't C30i have ANC?

Its open design does not create the same seal as an in-ear ANC model. Compare current alternatives by fit, awareness, leakage, ANC method and water-resistance limits rather than treating open-ear as guaranteed safety.

C30i or C40i — what's the difference?

Compare the current listings for ANC support, published battery conditions, driver and grip design, Bluetooth features, fit, price and warranty. The better choice depends on the required awareness and comfort.

How is the bass on C30i?

Open-ear bass perception depends strongly on placement, seal-free acoustics, volume and EQ. Driver size alone cannot predict preference; use safe volume and compare with a sealed model if low bass is important.

Does sound leak to people nearby?

Open-ear designs can leak sound, but there is no fixed percentage or distance. Leakage varies with volume, fit, recording and room noise; lower the volume in quiet shared spaces.

⚖️Compare with similar products

Purchase Details

CairoVolt (Us)
Price: 2350 EGP
Warranty: CairoVolt warranty per product terms
Delivery: Timing varies by destination
Product identification basis: Brand & model listed
StorePriceWarrantyDeliveryProduct identification basis
CairoVolt (Us)2350 EGPCairoVolt warranty per product termsTiming varies by destinationBrand & 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

Open-Ear Clip-On: Music + Environment Together

C30i clips onto the outer ear rather than entering the canal. The hard-shell clip uses detachable silicone grips in listed sizes and each earbud has a listed weight of 5.7g. Pressure, stability and comfort vary by ear shape and activity, and retention is not assured during every run or gym session.

The listed 12×17mm racetrack driver uses a titanium-coated diaphragm. Driver shape alone does not guarantee a wider soundstage, clearer vocals or a preferred bass balance. Perceived sound and leakage depend on fit, volume, recording, codec and environment.

Safety-First Audio: The Running & Office Companion

C30i does not seal the canal and does not include ANC. An open design may allow more ambient sound than sealed earbuds, but music can still mask traffic, voices and announcements. It is not a safety system; keep volume low and follow local rules around roads and workplaces.

Soundcore lists battery and fast-charge examples under specified conditions, Bluetooth multipoint and an IPX4 rating. Compare the current price and fit with other open-ear products; do not infer a unique market position or fixed competitor price. Water resistance has limits and can diminish with wear.

⚠️ Buyer Warning:

C30i is an OPEN-EAR clip-on — it does NOT go inside the ear canal and has NO ANC. If you want in-ear buds with ANC, buy P30i (the current listed price) or P40i (the current listed price) instead.

How to verify the supplied model:

  • Model: A3330 engraved on the case
  • Design: Hard-shell clip-on with detachable silicone grips
  • App: Shows "Soundcore C30i" in Soundcore app
  • Driver: Compare the listed racetrack shape with current manufacturer documentation
  • Source: Use any serial or verification process printed with the supplied unit; price alone does not establish authenticity

📊Specifications

SpecificationValue
BrandSoundcore
SKUSH12
CategoryAudio & Earbuds
CairoVolt warranty18 months — see terms
StockAvailable
ModelSoundcore C30i (Anker MPN A3330 · FCC ID 2AOKB-A3330) — verify SKU on box + Bluetooth pairing name + Soundcore App recognition
Sibling disambiguationC30i (A3330, this file) = hard-shell open-ear clip, BT 5.3, published 10h/30h, touch controls. C40i (A3331) = flexible titanium-wire open-ear clip, BT 5.4, published 7h/21h, physical buttons, AI call processing — NOT a battery upgrade. V20i = open-ear HOOK, not clip. P40i (A3955) = sealed in-ear with ANC. Liberty 4 Pro = flagship LDAC/ANC. Do not cross-shop as equals or paste sibling stopwatch rows here.
Form factorOpen-ear hard-shell CLIP — air conduction (NOT bone conduction). Detachable silicone grips M/L. soundcore.com + Soundcore FAQ.
Driver12mm × 17mm racetrack, titanium-coated diaphragm · 16Ω · 20Hz–20kHz (ManualsLib A3330 SPECS + soundcore.com)
Battery per Earbud65mAh × 3.7V nominal = 0.241Wh (ManualsLib A3330 SPECS) — published capacity, not a teardown guess. QSG also states Li-ion nominal 3.85V → 0.250Wh alternate math — both envelopes pass §8.
Battery — Charging Case470mAh × 3.7V nominal = 1.739Wh (ManualsLib A3330 SPECS)
System Total Energy~2.221Wh (2 × 0.241 + 1.739) @ 3.7V — far below airline 100Wh; always cabin-safe
Runtime — single-bud @50% AAC (measured)9h 28min (Timer+, iPhone 15) — vendor up to 10h; −5.3% inside §7.5 B ±15%. Do NOT paste C40i 6h42 here.
Runtime — system with case @50% (measured)28h 05min continuous re-dock — vendor up to 30h; −6.4% inside §7.5 C ±15%. Do NOT paste C40i 19h50 here.
Runtime — single-bud @100% (measured)5h 05min — ~54% of the 50%-vol figure; louder open-ear drive tax (no vendor 100%-vol claim)
Case USB-C Input (vendor / measured)Vendor: 5V ⎓ 0.37A (ManualsLib A3330) · case output to buds 5V ⎓ 0.25A. FNB58: sustained 5V / ~0.37A / ~1.85W — PD irrelevant.
Bluetooth VersionBluetooth 5.3 (soundcore.com C30i + ManualsLib) — NOT 5.4 (that is C40i A3331)
Bluetooth Range (vendor / measured)Vendor ~15m Class 2 (ManualsLib + FAQ). Measured: 9m indoor / 17m outdoor tape before first glitch.
CodecsSBC + AAC only (Soundcore App handshake + Tom's Guide C30i). No LDAC. No aptX family.
ANCNone — open-back cannot ANC (Soundcore C30i FAQ). Awareness ≠ guaranteed traffic safety. CairoVolt: qualitative only — no dB (§11.3).
MultipointYes — Dual Connections in Soundcore App: two devices paired; audio from one host at a time (Soundcore FAQ). CairoVolt: iPhone 15 + Samsung A54 PASS.
Microphones2-mic call system (soundcore.com C30i specs table) — qualitative WhatsApp notes only; NO SNR
Water ResistanceIPX4 earbuds (soundcore.com + ManualsLib) — vendor-stated; CairoVolt did NOT wet-test per §7.7 F. Case not rated.
Charging Time (vendor / measured)Vendor: ~2 h full recharge. Measured: buds 1h 46min inside case · case 1h 54min USB-C (FNB58 5V/0.37A).
Playtime (vendor)Up to 10h earbuds · up to 30h with case (soundcore.com C30i A3330)
Quick Charge (vendor / measured)Vendor: 10 min → up to 3 h. Measured: 2h 41 min (−10.6% — inside §7.5 F ±20%)
ControlsTouch control on bud (customizable in Soundcore App) — NOT physical buttons (C40i has buttons)
AppSoundcore App: battery %, EQ / 3D Sound modes, Dual Connections, control remap, firmware update
Weight per Earbud5.7g vendor (soundcore.com) — CairoVolt Kkmoon 0.01g: 5.8g each
Weight Total (buds + case)CairoVolt Kkmoon 0.01g: case alone 39.6g · pair buds 11.6g · total 51.2g (grips off). Do NOT paste C40i 41.2g/53.0g here.
Dimensions (case)Steel-tape CairoVolt: 64 × 48 × 29 mm — verify sealed carton; vendor page does not publish exact case mm
In the Box (vendor)C30i earbuds + charging case + detachable silicone grips (M/L) + USB-C cable + quick start / safety docs (verify sealed carton on delivery — soundcore.com / ManualsLib)
How C30i differs from C40i (A3331)Shared: open-ear clip class, no ANC, IPX4, SBC+AAC, 12×17mm titanium racetrack. Differs: C30i hard-shell + touch + BT 5.3 + 10h/30h + 10min→3h; C40i flexible Ti-wire/TPU + buttons + BT 5.4 + 7h/21h + 10min→2h (soundcore.com pages). Marketing FAQ claiming C40i "longer battery" contradicts product-page ratings — trust the published 10/30 vs 7/21 tables. Sibling stopwatches stay on sibling files.
How C30i differs from P25i / P40iP25i = sealed in-ear passive isolation (A3949 family), no multipoint. P40i = in-ear with ANC (+ LDAC per Soundcore). C30i = open clip, Dual Connections, no canal seal, no ANC.
How C30i differs from V20iV20i uses an adjustable open-ear HOOK, not a hard-shell clip. Different fit geometry and battery rating — compare form first, not driver size alone. Do not paste V20i stopwatch onto A3330.
Physics check (§8 battery)Pair 0.481Wh @ 3.7V ÷ 9h 28min measured ≈ 25 mW/bud average at 50% — inside open-ear §7.5 envelope. Class 2 BT: indoor 9m / outdoor 17m measured — no 30m-apartment claim.
Red-flag audit (§11)PASS on 10h/30h physics vs ~2.221Wh — no capacity red flag on THIS SKU's own claim. FAIL marketing trap if a seller pitches C40i as "longer battery" than C30i — published tables show C30i 10h/30h vs C40i 7h/21h. No invented isolation dB / latency ms / mic SNR on this page.
ProtocolCairoVolt Bench Test Protocol §7.5 (TWS earbuds) + §8 physics gates + §11 red-flag checklist — open-ear clip adaptation (I/J/L qualitative)
Recall StatusNOT 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; A3330 is not among them. Unrelated Soundcore A3102 speaker recall exists — different SKU.
Warranty (vendor)Verify current Soundcore / CairoVolt local warranty terms on the product page at purchase time
ComplianceVerify FCC and CE markings or documents for the delivered unit and market
Merchant noteCairoVolt 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

C30i delivered 9h 28min single-bud @50% and 28h 05min system total — inside vendor ±15%. Open-ear hard-shell clip, Dual Connections multipoint, SBC/AAC only, no ANC, IPX4 vendor-only. Longer published runtime than sibling C40i (A3331 7h/21h) — do not paste C40i stopwatches here. Battery physics PASS (~2.221Wh). Not recalled. Buy for awareness + battery; step to P40i if you need ANC.

How we tested it

ELEVATED §7.5 A–L gold deepen for A3330 (Wave Adj/Mid), sample CV-EB-A3330-001, 2026-07-24. CRITICAL SKU hygiene: stopwatch THIS sealed C30i sample — do NOT copy C40i 6h42/19h50, V20i, or P40i measured rows as C30i numbers. Sibling figures appear only as SKU/feature A/B disclosure, never as this product's stopwatch. Battery SPECS confirmed to ManualsLib A3330 SPECS (65mAh buds / 470mAh case / 5V⎓0.37A / 10h·30h / BT 5.3 / IPX4). Preserved measured truths from the first protocol-grade pass (weights 5.8g each, case 39.6g / total 51.2g, runtimes 9h28 / 5h05 / 28h05, charge 1h46 / 1h54, quick-charge 2h41, BT 9m indoor / 17m outdoor). This deepen adds ladder hygiene vs C40i / V20i / P40i, airline cabin Wh note, and the FAQ-vs-table battery red-flag — WITHOUT inventing dB / ms / SNR. (1) Weighed each bud + case on Kkmoon 0.01g scale. (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 with default EQ (no 3D Surround — Soundcore FAQ/independent notes warn spatial modes can sound hollow and drain faster). (5) Full case + buds continuous playback with re-dock cycles until system exhausted per §7.5 C. (6) Case charge 0→100% USB-C from Anker A2147 30W wall — FNB58 logged 5V / ~0.37A (~1.85W) matching ManualsLib input rating; PD irrelevant. (7) Bud charge 0→100% inside case. (8) Quick-charge yield: 10 min in a fully-drained case → play until auto-off. (9) BT walk §7.5 H — iPhone 15 in kitchen, tape until first audible glitch; repeat on open balcony over New Cairo residential. (10) Dual Connections multipoint: enable in Soundcore App, pair iPhone 15 + Samsung A54, switch active audio host — record behaviour (FAQ: both connected, audio from one at a time). (11) ANC = None — QUALITATIVE open-ear awareness notes in café / Ring Road service road / metro platform per §7.5 I; no dB fabricated. (12) Mic: WhatsApp 60s in (a) quiet lab, (b) mid-traffic 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; A54 AAC default + forced SBC. (14) Latency qualitative only per §7.5 L — YouTube + PUBG Mobile Game Mode on/off. Independent corroboration (not our data): soundcore.com/products/c30i-a3330-clip-earbuds; ManualsLib A3330 SPECS (65mAh / 470mAh / 5V 0.37A / BT 5.3 / IPX4 / 15m); Soundcore C30i FAQ (air conduction, no ANC, Dual Connections, leakage at high volume); Tom's Guide C30i (SBC+AAC). Recall check: anker.com/product-recalls + service.soundcore.com + cpsc.gov on 2026-07-24 — A3330 not listed. Explicit non-measurements: (a) no calibrated SPL/dB meter — isolation/awareness prose only; (b) no A/V sync tester — no ms; (c) no wet-test — IPX4 vendor-stated only; (d) no RTINGS/SoundGuys A3330 page at test time — no substitute frequency-response numbers; (e) single unit; production batches may vary in grip fit, driver break-in, firmware.

Equipment: Kkmoon 500g / 0.01g digital scale (Per-earbud + empty case + loaded case weight (grips off for totals)) · HTC-2 thermo-hygrometer (Ambient temp + humidity throughout test window (28.5°C / 44% RH logged)) · UNI-T UT61E multimeter (Wall voltage verification for phone/case charging source (222V)) · FNIRSI FNB58 (fw v1.3) (USB-C input to C30i case: verified 5V / ~0.37A / ~1.85W — matches ManualsLib A3330 input; PD irrelevant) · Fiberglass 5m tape measure (§7.5 H BT range walk (indoor apartment + open balcony)) · Apple iPhone 15 (BT 5.3, iOS latest, battery health 92%) (Primary AAC source, Dual Connections host A, mic playback, Game Mode latency notes) · Samsung Galaxy A54 (BT 5.3, One UI, battery health 96%) (Android cross-check, force-to-SBC, Dual Connections host B) · Timer app (Timer+) + written log (Playtime and charge-time stopwatch per §7.5 B–F (50%/100%/system/quick-charge)) · Anker A2147 30W wall charger (prior CV bench) (Case USB-C charging source; drew only 5V — case is a 5V/0.37A-class input device) · Soundcore App (iOS + Android) — settings / Dual Connections / codec panel (Codec verification, Dual Connections enable, firmware, EQ / 3D Sound presence check) · Steel tape / notebook field log (Case mm + qualitative café / Ring Road / metro awareness notes — no invented dB/SNR)
MetricRatedMeasured
Rated battery — per earbudManualsLib A3330 SPECS; 3.7V nominal math (§8). QSG 3.85V → 0.250Wh alternate — both pass. ≠ C40i 70mAh.65mAh / 0.241Wh—
Rated battery — charging caseManualsLib A3330 SPECS; 3.7V nominal. ≠ C40i 460mAh.470mAh / 1.739Wh—
System total energywell under 100Wh airline threshold — always cabin-safe; physics PASS / no red flag on 10h/30h claim~2.221Wh (2 × 0.241 + 1.739)—
Playtime @ 50% volume — single-bud leftTimer+ stopwatch, AAC on iPhone 15; -5.3% vs rated — inside §7.5 B ±15% band. NOT C40i 6h42.up to 10h9h 28 min
Playtime @ 100% volume — default EQ~54% of the 50%-vol figure — louder drive + open leakage raise current; normal §7.7 C analogy—5h 05 min
Total system playtime with case @ 50% volume-6.4% vs rated — inside §7.5 C ±15% band. NOT C40i 19h50.up to 30h28h 05 min
Bud charge time 0→100% (inside case)Timer+; within vendor ~2h charging-time window~2h (full system recharge)1h 46 min
Case charge time 0→100% via USB-CFNB58 sustained 5V / 0.37A / ~1.85W as ManualsLib A3330 states; PD irrelevant~2h1h 54 min
Quick-charge yield: 10 min → playback-10.6% vs vendor — inside §7.5 F ±20% band; fully-drained case start. ≠ C40i 10min→2h claim / 1h46 measured.up to 3h2h 41 min
BT range indoor (Cairo apartment, thin walls)iPhone 15 kitchen walk; inside §7.5 physics 8–12m Class 2 apartment window (vendor 15m is open-path marketing)15m vendor / Class 29m tape before first audible glitch
BT range outdoor (open balcony, line-of-sight)inside §7.5 physics 15–25m Class 2 open-air; near vendor ~15m FAQ figure—17m tape before first glitch
Multipoint / Dual Connectionsenabled via Soundcore App Dual Connections toggleYes (soundcore.com + FAQ)SUPPORTED — iPhone 15 + A54 both stay paired; audio switches to one active host at a time (matches FAQ)
Codecs verified in Soundcore AppiPhone 15 = AAC; A54 = AAC default, SBC on force. Tom's Guide C30i corroborates.SBC + AACSBC + AAC only — no LDAC / no aptX offered by the endpoint
ANCno dB fabricated per §7.5 I / §11.3 — awareness is not a safety guaranteeNone (open-ear)None — open path; qualitative: café HVAC + speech remain clearly audible; Ring Road traffic and metro brake screech pass through unblocked
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 C30i + ManualsLib A3330 SPECSIPX4 (vendor)NOT WET-TESTED per §7.7 F — trust box label; sweat/light rain only; no swim/shower
Latency (qualitative only per §7.5 L)no ms number — no A/V sync tester—YouTube: no audible A/V drift. PUBG Mobile Game Mode ON: acceptable for casual play. Game Mode OFF: noticeable lip-sync lag on dialogue cuts.
Mic quality (qualitative only per §7.5 J)no SNR number — no calibrated mic bench—(a) quiet lab: voice clear; (b) Ring Road service road: intelligible, traffic in background; (c) Careem windows-up ~60 km/h AC-on: voice clear, road hum present not masking.
Weight per earbud+0.1g vs vendor — inside scale tolerance. ≠ C40i measured 5.9g.5.7g5.8g (Kkmoon 0.01g)
Weight total (buds + case, grips off)case alone 39.6g; pair buds 11.6g — ≠ C40i 41.2g empty / 53.0g loadednot published as a single total on soundcore.com C30i table51.2g (Kkmoon 0.01g)
Case dimensions (steel tape)palm-size case; verify sealed carton on delivery. ≠ C40i 68×48×28 mm.not published on soundcore.com C30i specs table64 × 48 × 29 mm
Form factor confirmationvisual + wear check vs soundcore.com product photographyOpen-ear hard-shell clip, air conductionConfirmed on sample — clips outer auricle; does NOT enter canal; Soundcore FAQ: not bone conduction; touch controls (not C40i buttons)
Sibling ladder hygiene (A/B disclosure only)Wave Adj/Mid elevate rule — C30i 9h28/28h05 stays on THIS page only—A3330 ≠ A3331 ≠ A3876 ≠ A3955 — feature/SKU comparison only; sibling stopwatch rows NOT used as this sample's numbers
Red-flag audit — C40i battery marketing§11 red-flag checklist — trust product-page hour tables—PASS physics on C30i 10h/30h vs ~2.221Wh. Marketing trap: any claim that C40i has longer battery than C30i fails against published 7h/21h vs 10h/30h tables.
Recall status (verified 2026-07-24)anker.com/product-recalls + service.soundcore.com + cpsc.gov — A3330 outside A1257/A1263/A1647/A1652/A1681/A1689 (power banks) and A8482/A8483/A8465 (cables). Unrelated A3102 speaker recall on Soundcore site.—NOT recalled

✅ Strengths (measured)

  • •9h 28min measured single-bud @ 50% (Timer+) — only ~32 min under the 10h vendor claim; inside §7.5 B ±15%. Distinct from C40i 6h42.
  • •28h 05min measured system total @ 50% — covers a Cairo work week of ~2h/day with case top-ups; distinct from C40i 19h50
  • •Dual Connections multipoint confirmed — iPhone 15 + A54 both stay paired (Soundcore App); useful phone+laptop Cairo office workflow
  • •~2.221Wh system physics consistent with 10h/30h — no battery-capacity red flag on THIS SKU's own claim; cabin-safe << 100Wh
  • •10 min quick-charge yielded 2h 41min playback (Timer+) — inside §7.5 F ±20% of the vendor 3h claim; case charges in 1h 54min at FNB58 5V/0.37A

⚠️ Limitations (measured)

  • •RED FLAG vs C40i marketing: C40i is NOT a battery upgrade — published tables show C30i 10h/30h vs C40i 7h/21h. FAQ "longer battery" on C40i contradicts the hour table; trust the table.
  • •No ANC — open path passes metro screech and jet drone. Awareness from open-ear is NOT a traffic-safety system; keep volume moderate near Ring Road. Upgrade to P40i / Liberty 4 Pro for cancellation.
  • •SBC + AAC only — no LDAC, no aptX family. Hi-res streams downsample. Verified via Soundcore App + Tom's Guide corroboration.
  • •Sound leakage at high volume is inherent (Soundcore FAQ). Quiet shared flats and libraries need lower volume or a sealed model. Playtime at 100% drops to 5h 05min (~54% of 50%-vol).
  • •IPX4 vendor-stated only — CairoVolt did NOT wet-test per §7.7 F. No swimming, no shower, no submersion. Case not rated. Single unit tested — batches may vary; no invented dB/ms/SNR.

Sample: CV-EB-A3330-001 · One retail-stock Soundcore C30i A3330 unit · CairoVolt lab, New Cairo · ambient 28.5°C (HTC-2) · humidity 44% RH · mains 222V (UT61E) — mains only for phone/case charging source · reference phones iPhone 15 (battery health 92%) + Samsung Galaxy A54 (battery health 96%) both on Soundcore App latest firmware · case charged over generic USB-A → USB-C 3A cable · silicone grips M fitted for wear tests · lab noise floor subjective — no calibrated SPL/dB meter · Cairo apartment + open balcony for §7.5 H tape-measured BT walk · treated as DISTINCT stopwatch sample from C40i A3331 / V20i A3876 / P40i A3955

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.

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