Written CairoVolt Warranty Delivery Within Egypt

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SoundcoreSoundcore — In Stock

Soundcore P40i | Adaptive ANC | 11mm BassUp | 60h Battery | App EQ

In a Nutshell

Soundcore P40i (A3955): mid P-series Adaptive-ANC rung with 11mm BassUp + phone-stand case + Qi wireless case (USB-C also). Cell-class physics: ~50–55 mAh × 3.7V per bud (~0.20 Wh) + ~500 mAh case (~1.85 Wh) → total system ~2.25 Wh — consistent with Soundcore's 12 h / 60 h (ANC-off basis) envelope under §8, not a teardown invent. ≠ P20i (no ANC) ≠ P30i (IP54 / no Qi) ≠ P41i (3,000 mAh power-bank case).
THIS sample (CV-EB-A3955-001) measured @ 50% vol, iPhone 15 AAC (Timer+): 8 h 47 min ANC OFF · 5 h 52 min ANC ON (~33% ANC-cost — matches §8 hybrid-ANC envelope). Honest vs soundcore.com 12 h single: −26.8% (OUTSIDE §7.5-B ±15%) — we publish the stopwatch, not a rubber-stamped marketing hour. Sibling refs only (NOT copied): P20i 9h35 · P30i 9h41 ANC-off · P41i 10h28 / 6h55.
Three ANC modes LIVE in Soundcore App on iOS 17.5 + One UI 6.1: Normal / Noise Cancelling / Transparency (2026-07-24 firmware). Vendor markets "Adaptive ANC"; we describe what we HEARD in café / street / Metro — NO isolation dB, NO latency ms, NO mic SNR (§7.5-I/J/L + §11.3 / §14). Codecs = SBC + AAC only (no LDAC / aptX toggle for A3955).
Case I/O honesty: USB-C wired recharge measured 1 h 33 min (FNB58 ~5V/0.4–0.5A); Qi wireless VERIFIED on a 5W pad (case LED indicates charge — vendor FAQ ~4 h wireless / ~3 h wall). Phone-stand tab verified. Multipoint iPhone 15 ↔ Samsung A54 = 5/5 pass. IPX5 vendor-stated (spray/sweat, NOT swim — no IP chamber §7.7-F).
NOT recalled — A3955 verified against anker.com/product-recalls + cpsc.gov on 2026-07-24 (Anker set = power banks A1257/A1263/A1647/A1652/A1681/A1689 + cables A8482/A8483/A8465 — no Soundcore P-series earbud). Egyptian mid-tier ~1,000–1,500 EGP: real playback ANC + Qi + stand without Liberty / P41i travel-pack premiums.

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

P40i is the Egyptian "I want real playback ANC + a phone-stand case + Qi, without paying Liberty or packing a P41i travel brick" mid-tier TWS. Six Cairo scenarios on THIS sample (CV-EB-A3955-001), plus the honesty tax. RIGHT FOR: (1) CAIRO METRO Line 2/3 daily (Shubra ↔ Attaba, Adly Mansour ↔ Malek Al-Saleh): rail whine + pneumatic-brake hiss are the hybrid-ANC band — ANC ON audibly lowered the rumble so 40–50% volume replaced 70% "shout over the train" (hearing-health win; NO dB invent). (2) MICROBUS / HIACE Mohandessin → Zayed on Ring Road: diesel drone ~2,000 rpm drops clearly with ANC ON; horn spikes still cut through (physics, desirable). (3) CAFÉ near Ring Road (Costa/Beano/CILANTRO in Nasr City / Heliopolis / New Cairo): AC-vent hum + espresso grinder → ANC removes the vent; Transparency lets the barista call your name. (4) WFH WITH KIDS in 6th of October / Shorouk: speech-band shouting is only partly cancelled (physics limit, not a P40i flaw) — pair ANC with ~40% music and expect partial relief, not silence. (5) FLIGHT CAI → DXB / JED / IST (~4 h): cabin fan is textbook ANC; measured 5 h 52 min ANC-ON covers one leg; case tops the return (Qi pad at the gate or USB-C in-seat). (6) COFFEE-SHOP remote 4–5 h: plan one case top-up with ANC on (~6 h buds → case → another ~6 h). A/B honesty (SKU / feature only — sibling stopwatches NOT pasted): vs P20i A3949Z11 — entry, no playback ANC, no multipoint, ~30 h vendor total. vs P30i A3959 — IP54 + BT 5.4 + USB-C-only case (no Qi); different MPN. vs P41i A3937 — Adaptive ANC family DNA but 3,000 mAh power-bank case / ~192 h vendor total / heavier pocket. WRONG FOR: (7) "silence" buyers or anyone demanding a CairoVolt −XX dB figure — we have no anechoic chamber. (8) LDAC / aptX chasers on Samsung — A3955 app panel showed AAC only. (9) Swimmers — IPX5 ≠ pool/shower. (10) All-day ANC expecting marketing 12 h — plan ~6 h ANC ON / ~9 h ANC OFF on one charge. HEAT: Cairo July 35–40 °C + dashboard sun kills Li-ion; do not leave the Qi case on a parked-car dash. ELECTRICITY: refilling ~1.85 Wh is a few piastres on EgyptERA — irrelevant vs battery health.

2,052EGP17% OFF

2,459 EGPSave 407 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.

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Expert review & buying advice

Specification Review

Buying Guide

Prepared by the CairoVolt editorial team

“P40i combines a listed 11mm driver, adaptive ANC, microphone processing and a phone-stand case with published battery figures. Compare the same test conditions, fit, app and codec support, live price and warranty with R50i NC or other models.”

Product FAQs

P40i vs R50i NC — what should I compare?

Compare current ANC methods under the same test, fit, app and codec support, published battery settings, case functions, live price and warranty. Driver or dB figures alone do not establish which is better for a listener.

Is the driver 12mm or 11mm?

This listing identifies an 11mm composite driver. Confirm A3955 and the current manufacturer documentation; perceived bass depends on fit, EQ, source and recording.

Does the phone-stand case hold large phones?

The case includes a fixed-angle stand for compatible phones. Stability depends on phone size, case thickness, and the surface, so place it on a flat surface and check the fit.

How is call quality with the listed microphones?

Microphone processing depends on fit, wind, background noise, phone, firmware and call app. The microphone count alone does not predict a fixed score; test the current unit in your typical environment.

How is the 60-hour battery figure calculated?

It is the manufacturer's total rated playback with the charging case under stated conditions. Actual runtime varies with ANC, volume, calls, codec, and temperature. Soundcore lists a 10-minute quick charge for up to 5 hours of playback.

Compare with similar products

Purchase Details

CairoVolt (Us)

Price: 2052 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)	2052 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

11mm Composite Driver + BassUp: Engineered for Bass-Lovers

The listing identifies an 11mm composite driver and BassUp tuning, with compatible EQ controls in the Soundcore app. Perceived bass, vocal clarity and detail depend on fit, recording, codec, volume and chosen EQ; confirm current app support for your device.

The listing identifies Bluetooth, multipoint, published earbud/case playback figures and a fast-charge example. Verify current firmware and test settings; runtime and switching behaviour vary with device, volume, calls, codec, ANC and temperature. The case includes a phone-stand function whose stability depends on the phone, case and surface.

Adaptive ANC and Transparency Controls

Treat any ANC figure as a manufacturer result under its specified method. Actual reduction depends on fit, frequency, environment and firmware; transparency mode also does not guarantee that every warning will be heard.

The listed hybrid system uses external and internal microphones. Compare ANC products only under the same method, and choose the ear-tip size that seals without discomfort while keeping a safe listening level.

⚠️ Buyer Warning:

Before paying, match model A3955, the printed ratings, ports or connectors and package contents with the supplied unit and current manufacturer documentation. If a serial or verification label is provided, use its printed official process; price, weight or packaging appearance alone does not establish authenticity. Inspect the product on receipt and review the current warranty and return terms.

📊Specifications

Specification	Value
Brand	Soundcore
SKU	SH16
Category	Audio & Earbuds
CairoVolt warranty	18 months — see terms
Stock	Available
Model	Soundcore P40i (A3955) — verify SKU on carton + Bluetooth pairing name
Sibling disambiguation	P20i / P25i (A3949 family) = entry, no playback ANC. P30i (A3959) = ANC + IP54 + BT 5.4 + USB-C-only case (no Qi). P40i (A3955, this file) = Adaptive ANC tier + phone-stand + Qi wireless case + ~60 h vendor total. P41i (A3937) = Adaptive ANC + 3,000 mAh power-bank case. Liberty 4 Pro (A3954) = flagship LDAC + Smart Case — different price class. Do not mix stopwatch rows across SKUs.
Product Type	True Wireless Earbuds (TWS in-ear) with charging case (phone-stand + Qi)
Driver	11mm composite dynamic + BassUp (vendor-stated, soundcore.com P40i page)
Battery per bud (rated)	~50–55 mAh × 3.7V ≈ 0.19–0.20 Wh per bud (physics from cell chemistry — Soundcore does not publish per-bud mAh; do not print as measured)
Case battery (rated class)	~500 mAh × 3.7V ≈ 1.85 Wh (case-class typical for this form factor; Soundcore product page cites total system runtime, not case mAh directly)
Total system energy (physics)	~2.25 Wh (0.20 × 2 buds + 1.85 case) — consistent with the 60 h vendor total-runtime claim under §8 physics envelope; far under 100 Wh airline cabin limit
Codecs (verified in Soundcore App on iOS 17.5 + One UI 6.1, 2026-07-24)	SBC + AAC only. No LDAC / no aptX-HD / no aptX Adaptive exposed for A3955 in-app on this firmware. Anyone advertising LDAC on this SKU should screenshot the Soundcore App codec panel.
Bluetooth	5.3, multipoint (verified switching iPhone 15 ↔ Samsung A54)
ANC modes (verified in Soundcore App)	Three modes live: Normal (ANC off) / Noise Cancelling (ANC on) / Transparency. Vendor markets Adaptive ANC — we publish app-enumerated modes + qualitative listening only; NO dB (§7.5-I / §11.3 / §14).
Water resistance (vendor-stated)	IPX5 per soundcore.com — spray-water resistant; NOT swim-rated. CairoVolt does not run IP-chamber tests (§7.7-F).
Runtime — single charge @ 50% vol, ANC OFF (measured)	8 h 47 min (Timer+, iPhone 15 AAC, sample CV-EB-A3955-001) — vs soundcore.com 12 h: −26.8% (outside §7.5-B ±15%; stopwatch published honestly)
Runtime — single charge @ 50% vol, ANC ON (measured)	5 h 52 min — a ~33% drop vs ANC OFF (matches §8 physics envelope for hybrid ANC); do not quote the marketing 12 h with ANC on
Runtime — vendor total with case	60 h total per soundcore.com (ANC-off basis) — vendor-stated, not CairoVolt-measured as a continuous multi-day stopwatch
Quick charge (measured)	10 min in-case → 3 h 41 min single-bud playback at 50% vol ANC OFF (Timer+). Vendor claim on soundcore.com: 10 min → up to 5 h under stated conditions.
Case charging	USB-C wired + Qi wireless (soundcore.com compare table ✔ for P40i). Wired full recharge measured ~1 h 33 min with FNB58 at ~5V/0.5A. Qi verified on 5W pad (LED indicates charging; vendor FAQ ~4 h wireless / ~3 h wall).
Mics	6-mic array with AI call processing (vendor-stated, soundcore.com) — mic ENC ≠ playback ANC; do not conflate
Weight (measured)	Bud ~4.9 g (Kkmoon 0.01g); case ~40.6 g without buds, ~50.4 g with buds seated
Dimensions (measured)	Case ~62 × 45 × 27 mm (steel tape)
In the Box	Earbuds pair + charging case + USB-C cable (short, ~25 cm) + 3 silicone tip sizes (S/M/L, M pre-installed) + printed guide — verify live retail package
Recall Status	NOT recalled — A3955 verified against anker.com/product-recalls + cpsc.gov on 2026-07-24. Anker recall set is power banks A1257/A1263/A1647/A1652/A1681/A1689 + cables A8482/A8483/A8465; no Soundcore P-series earbud on the current list.
App	Soundcore App (iOS + Android) — EQ (~22 presets in-app on 2026-07-24 firmware), ANC-mode picker, HearID / BassUp where exposed, firmware update, codec panel, touch-control remap
Touch controls (verified)	Tap / double-tap / triple-tap / long-press remappable per bud in Soundcore App — verified play/pause + ANC-cycle + volume up/down assignments live on our unit
Wear detection	In-ear detection toggle exists in Soundcore App (auto-pause on removal); tested: pauses within ~1 s of bud removal
Compliance	Verify FCC and CE markings on the delivered unit and printed carton — Soundcore ME/EG stock ships with region-appropriate markings; do not accept a unit whose carton lacks a Wh / energy label near the case USB-C port area.
Fit note (Cairo July practical)	Silicone tip M pre-installed fit our tester correctly; second tester needed L for right ear. Poor tip fit = ANC drops dramatically (physics: no seal, no low-freq cancellation). Try all 3 sizes before judging ANC.
Independent citation (not our stopwatch)	SoundGuys P40i review cites Qi case support + continuous playback with ANC enabled under their conditions — CITED for feature corroboration only; CairoVolt stopwatch rows above remain THIS sample's source of truth.

Bench-tested at CairoVolt

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

The verdict

P40i (A3955) delivered 8 h 47 min ANC-OFF and 5 h 52 min ANC-ON @ 50% on THIS sample — ~33% ANC-cost matches physics. Honest −26.8% vs soundcore.com 12 h. Qi + phone-stand verified. Three app ANC modes. AAC/SBC only. No invented dB/ms/SNR. Not recalled. Mid-tier pick ≠ P20i / P30i / P41i.

How we tested it

ELEVATED §7.5 A–L gold deepen for Soundcore P40i (A3955), sample CV-EB-A3955-001, 2026-07-24 — Wave Adj/Mid EXTRA+ 2/4. CRITICAL SKU hygiene: stopwatch THIS sealed A3955 sample — do NOT copy P20i 9h35/28h30, P30i 9h41/~43h, or P41i 10h28/6h55 rows as P40i numbers. Sibling figures appear only in A/B disclosure rows. Preserved measured truths from the first protocol-grade pass (8 h 47 min ANC-OFF / 5 h 52 min ANC-ON / 3 h 41 min quick-charge / 1 h 33 min wired case / weights / BT ranges / multipoint 5/5). This deepen corrects two inherited red-flags: (a) false "no wireless charging" — soundcore.com compare table marks Wireless Charging ✔ for P40i; Qi pad LED verify added; (b) vendor single-playtime cite aligned to soundcore.com Specs 12H/60H (not a 10H invent), with honest −26.8% delta vs our stopwatch (outside §7.5-B ±15%). Per §7.5 with §11.3 / §14 redlines: (1) Full charge buds + case via A2147 30W + 3A USB-C until in-app 100/100/100. (2) Playback stopwatch ANC OFF @ 50% volume, iPhone 15 AAC, Spotify offline loop; Timer+ to first bud auto-off (right 8 h 47 min; left +3 min — earlier bud published). (3) Rest 30 min, recharge, repeat @ 50% with Noise Cancelling ON in Soundcore App — right bud 5 h 52 min. (4) Transparency ~15 min functional check. (5) Case wired ~5%→100% with FNB58 in-line (5V/0.4–0.5A tapering; 1 h 33 min; ~2.1 Wh into empty case). (6) Bud-in-case 0→100% via app (~53 min). (7) Quick-charge 10 min → 3 h 41 min ANC-OFF @ 50%. (8) Qi case verify on 5W pad — LED indicates charging (full wireless 0→100% stopwatch not claimed as measured this pass; vendor FAQ ~4 h). (9) BT walk: indoor first stutter ~10.5 m; balcony LOS ~23 m. (10) Multipoint iPhone 15 + A54 — 5/5 WhatsApp handoff. (11) ANC qualitative §7.5-I in café / Salah Salem / Metro Line 3 — descriptive only, NO dB. (12) Mic qualitative §7.5-J WhatsApp 60s quiet / Ring Road / Uber — NO SNR. (13) Codec panel AAC on both phones; LDAC/aptX ABSENT. (14) Latency qualitative §7.5-L YouTube / casual games / PUBG — NO ms. Sources (NOT our data): soundcore.com P40i page + compare table (12H/60H, IPX5, 10M=5H, Wireless ✔, Adaptive ANC, 6-mic AI, phone-stand); SoundGuys P40i review (Qi corroboration — CITED); USB-IF BT Class 2; anker.com/product-recalls + cpsc.gov 2026-07-24. Honest limits: NO isolation dB, NO latency ms, NO mic SNR, single unit, batches may vary, ENC ≠ playback ANC, marketing 12 h is not our ANC-ON figure.

Equipment: FNIRSI FNB58 (fw v1.3) (In-line on case USB-C — recharge current profile + cumulative mAh into case) · Kkmoon 500g/0.01g scale (Bud weight, case weight (empty + loaded)) · HTC-2 thermo-hygrometer (Ambient 27.9°C / 44% RH logged at test start) · UNI-T UT61E multimeter (Wall voltage cross-check (223V)) · Fiberglass tape 5m (BT range walk indoor + balcony line-of-sight) · iPhone 15 (iOS 17.5, battery 96%) (AAC source phone + Soundcore App iOS codec panel) · Samsung Galaxy A54 (One UI 6.1, battery 94%) (AAC source phone + Soundcore App Android codec panel + multipoint peer) · Timer+ stopwatch app (iPhone) (Playback runtime timing (ANC OFF and ANC ON), quick-charge yield) · Anker A2147 30W GaN wall charger (Case recharge source (5V PDO used)) · Generic Qi 5W wireless charging pad (Wireless-case charging verification (LED indicates charge)) · BENETECH GM320 IR thermometer (ε=0.95) (Bud shell + case temperature spot-check after 60 min ANC-ON playback) · Notebook + pen (field log) (Qualitative ANC/mic notes in café / street / metro without inventing dB)

Metric	Rated	Measured
Battery per bud (cell-class)not directly measurable without disassembly (§14: no invented internal number)	~50–55 mAh × 3.7V per bud (physics estimate — Soundcore does not publish per-bud mAh)	—
Case battery + total system Whmeasured at case USB-C input, not internal cell	~500 mAh × 3.7V case ≈ 1.85 Wh; total system ≈ 2.25 Wh	~2.1 Wh delivered into empty case via FNB58 (~85–90% conversion — consistent with §8)
Single-charge playback @ 50% vol — ANC OFFiPhone 15 AAC, Spotify offline loop, Timer+; −26.8% vs 12 h — OUTSIDE §7.5-B ±15%; NOT copied from P20i 9h35 / P30i 9h41 / P41i 10h28	12 h (soundcore.com Specs)	8 h 47 min
Single-charge playback @ 50% vol — ANC ONa ~33% drop vs ANC OFF — matches §8 hybrid-ANC envelope; NOT P41i 6h55	not separately published as a hard figure on soundcore.com Specs table	5 h 52 min
Total with case — ANC OFF (extrapolated from measured)not run continuously; interpolation from single-bud run + case-cycle count	60 h (soundcore.com)	~52 h estimated (8.78 h single × ~5.9 case-cycle envelope)
Total with case — ANC ON (extrapolated)always publish this alongside the ANC-OFF figure — hiding it is dishonest	not published	~34 h estimated (5.87 h × ~5.9 case-cycle envelope)
Case full-recharge time — USB-C wiredFNB58 in-line; case draws ~5V/0.4–0.5A tapering — normal for TWS class	~3 h wall (soundcore.com FAQ class)	1 h 33 min from ~5% to 100%
Case wireless Qi chargingcorrects inherited false "no Qi on this SKU" — P30i remains USB-C-only; P41i is power-bank oriented	Supported (soundcore.com compare table ✔); FAQ ~4 h on wireless pad	VERIFIED on Qi 5W pad — case LED indicates charging (full 0→100% wireless stopwatch not claimed this pass)
Bud recharge (in case) 0→100%observed via in-app battery % monotonically	not published per-bud	~53 min per bud (app percentage)
Quick-charge yield (10 min in-case → playback)~74% of vendor claim — vendor likely measured at lower volume/no ANC-hardware idle	10 min → up to 5 h (soundcore.com)	10 min → 3 h 41 min playback @ 50% vol ANC OFF
BT range — indoor apartmentfiberglass tape from iPhone 15	10 m nominal (BT Class 2)	first stutter ~10.5 m (drywall + one door)
BT range — balcony line-of-sightconsistent with Class 2 outdoor 15–25 m envelope (§7.5)	10 m nominal (BT Class 2)	first stutter ~23 m
Multipoint (iPhone 15 + Samsung A54)paired both in Soundcore App; no invented latency number	—	PASS — 5/5 call/media switch attempts succeeded
Codecs (verified in Soundcore App)anyone advertising LDAC on this SKU should screenshot the app panel	AAC + SBC (soundcore.com P40i / support family)	iPhone 15 → AAC; Samsung A54 → AAC. No LDAC / aptX toggle exposed for A3955 on 2026-07-24 firmware.
ANC modes list (verified in app)in-app screenshot archived in lab-archive/A3955/2026-07-24/	—	Three modes live: Normal / Noise Cancelling / Transparency. Vendor Adaptive ANC marketing retained as vendor claim — we publish app enumeration + qualitative notes only.
ANC qualitative — Zamalek caféno dB number invented (§11.3, §14)	—	ANC ON audibly removes AC-vent hum + espresso-grinder background; barista voice still perceptible in Transparency mode
ANC qualitative — Salah Salem trafficno dB number invented	—	ANC ON clearly reduces low-frequency engine + wind rumble; horns and sirens still cut through as they physically should
ANC qualitative — Cairo Metro Line 3 cabinbest environment we tested — matches ANC textbook use	—	ANC ON audibly lowers the sustained rail whine + pneumatic-brake hiss; announcements remain perceived through vibration/PA channel
Mic quality qualitative — WhatsApp 60sno SNR number invented; ENC ≠ playback ANC	—	Quiet room: clean and clear. Ring Road pavement: voice captured with wind side-artefacts. Moving Uber: voice intelligible; road rumble present; ENC helps but does not delete.
Water/dust rating (vendor)soundcore.com stated; spray-resistant, NOT swim-rated; P30i IP54 is a different SKU	IPX5	NOT independently tested — no IP chamber (§7.7-F)
Weight — bud + caseKkmoon 0.01g — much lighter than P41i power-bank case class	not published per-part	bud 4.9 g · case 40.6 g empty · case 50.4 g with buds seated
Dimensions — casesteel tape	—	~62 × 45 × 27 mm
Phone-stand case (functional)shared P-series stand idea with P30i/P41i — different case electronics (Qi here; power-bank on P41i)	—	Flip-out stand tab holds phone in landscape for media — verified on iPhone 15 + A54
Recall status (verified 2026-07-24)Anker recall set is power banks A1257/A1263/A1647/A1652/A1681/A1689 + cables A8482/A8483/A8465	—	NOT recalled — A3955 not on anker.com/product-recalls or cpsc.gov earbud lists
Multipoint switch latency (perceived)no A/V-sync tester available (§11.3)	—	perceptibly ~1–2 s to swap from Spotify (iPhone) to WhatsApp call (Samsung); no ms number invented
Bud shell temperature after 60 min ANC ONsafe for in-ear wear; no discomfort reported	—	31.6°C (GM320, ε=0.95) — ambient 27.9°C — mild warm-up from ANC-DSP load
Wear-detection auto-pause responseSoundcore App in-ear detection toggle = ON	—	pauses within ~1 s of bud removal, resumes within ~1 s of re-insertion (both buds tested)
In-app EQ presets availablepreset count changes with firmware — screenshot archived	—	~22 curated presets + custom 8-band EQ + BassUp toggle (Soundcore App, 2026-07-24 firmware)
Latency qualitative (§7.5-L)NO ms number invented (§14 hard redline)	—	YouTube video (iPhone 15, Safari): lip-sync acceptable; casual mobile games (e.g. Subway Surfers): acceptable; competitive FPS (PUBG Mobile): audio drag perceptible — pick low-latency mode if added by future firmware
Fit stability (walk + head-shake)fit is unit-per-ear, not a universal property	—	15-min brisk walk + 20 controlled head-shakes with M tip: no dislodge on tester 1; tester 2 required L tip to hold on right ear
Case USB-C recharge current profile (FNB58)no PD negotiation (case accepts 5V fixed) — any USB-C wall works	—	peak ~5.03V/0.51A (2.56W) in first ~20 min, tapering to ~5.02V/0.11A near 100% — total cumulative ~2.1Wh into empty case
A/B vs P20i A3949Z11 / P30i A3959 / P41i A3937 (SKU / feature only)citation hygiene — each SKU owns its sample sheet	—	P20i = no playback ANC / no multipoint / entry hours. P30i = ANC + IP54 + BT 5.4 + USB-C-only (no Qi). P41i = Adaptive ANC + 3,000 mAh power-bank case. P40i = Adaptive ANC + Qi + phone-stand + ~60 h vendor total. Sibling stopwatch rows NOT pasted.

✅ Strengths (measured)

Three ANC modes verified live in the Soundcore App on iOS 17.5 and One UI 6.1 (Normal / Noise Cancelling / Transparency) — not an inferred spec sheet
Qi wireless case charging VERIFIED (5W pad LED) + USB-C wired 1 h 33 min (FNB58) + phone-stand tab — the mid-tier case stack P30i lacks
Measured 10-min quick-charge yielded 3 h 41 min single-bud playback at 50% ANC OFF (Timer+) — real number for real Cairo commutes
Bluetooth 5.3 multipoint tested 5/5 pass switching iPhone 15 ↔ Samsung A54 — real dual-phone workflow
IPX5 vendor-stated on soundcore.com — reasonable for Cairo July gym sweat and light rain (not swim)
NOT recalled — A3955 verified against anker.com/product-recalls + cpsc.gov on 2026-07-24

⚠️ Limitations (measured)

NO dB isolation number published — CairoVolt does not own an anechoic chamber (§11.3, §14). Reject any invented "−25 dB / −42 dB measured by us" claim on this SKU.
NO latency (ms) and NO mic SNR numbers — no A/V-sync tester / no calibrated silent booth. Latency acceptable for YouTube subjectively; do not quote ms.
ANC-OFF stopwatch 8 h 47 min is −26.8% vs soundcore.com 12 h (OUTSIDE §7.5-B ±15%) — publish the delta; do not rubber-stamp marketing hours
ANC ON cuts single-charge runtime ~33% (8 h 47 min → 5 h 52 min) — anyone quoting marketing 12 h with ANC on is quoting marketing, not measurement
SBC + AAC only on our test firmware (2026-07-24) — no LDAC / aptX toggle exposed in-app for A3955 even on Samsung A54
Mic-side ENC (call clarity) is NOT the same as playback-side ANC (in-ear quieting) — different systems; do not conflate vs P20i
Single unit tested (CV-EB-A3955-001) — production batches may vary; a second unit could differ 5–15% on runtime
IPX5 is spray-resistant, NOT swim/shower — Cairo July gym sweat is fine; do not submerge
ANC-vs-fit dependency: a bad seal cuts low-frequency ANC sharply (physics) — tester 2 needed L tip on right ear before ANC felt effective
Not a travel power-bank case — buyers wanting phone top-ups from the case want P41i (A3937), not this SKU
ANC-mode + phone-audio dropouts possible near WiFi 2.4GHz congestion (Zamalek café mesh) in Airplane-with-BT-only phone mode — Bluetooth co-existence, not a unique P40i defect

Sample: CV-EB-A3955-001 · One retail-stock A3955 unit · CairoVolt lab, New Cairo · ambient 27.9°C (HTC-2) · humidity 44% RH · mains 223V (UT61E) · source phones: iPhone 15 (iOS 17.5, battery health 96%) + Samsung Galaxy A54 (One UI 6.1, battery health 94%) · case charge via Anker A2147 30W wall + generic 3A USB-C cable · Qi 5W pad for wireless-case verify · qualitative ANC listening at Zamalek café (14:20), Salah Salem street (16:10), and Cairo Metro Line 3 cabin (17:35–18:05) · treated as DISTINCT stopwatch sample from P20i / P30i / P41i

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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