Batterie Apple Watch Series 5 et SE A2277 / A2181 | 40 mm 245 mAh et 44 mm 296 mAh | Remplacement pour les modèles MKNC2LL/A
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✅ Fits Apple Watch Series 5 (40mm & 44mm) and Apple Watch SE 1st Gen (2020, 40mm & 44mm) — P/N A2277 (40mm, 245mAh) and A2181 (44mm, 296mAh)
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✅ Precision-spec’d cells: ±0.1mm dimensional tolerance — critical for OLED-safe installation without display heat damage
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✅ Supports full ECG, blood oxygen, and heart rate sensor functionality post-replacement; no sensor calibration errors
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✅ Factory direct — both size variants available; custom labeling from 200 pcs; 12-month warranty; DOA < 0.3%
Description du produit
Apple Watch battery replacement is technically different from iPad or iPhone battery work — and the margin for error is smaller. The Apple Watch Series 5 and Apple Watch SE share the same battery architecture across both the 40mm and 44mm variants. The 40mm uses P/N A2277 at 245mAh / 3.82V; the 44mm uses A2181 at 296mAh / 3.82V. Both are single-cell Li-Polymer designs in compact form factors where dimensional tolerance is a direct safety variable.
The Watch display is OLED, adhered to the case with heat-activated adhesive. To access the battery, a repair technician must apply heat (typically 70–80°C) to soften that adhesive before separating the display. A battery that is even 0.15mm thicker than spec will prevent the display from re-seating flush after replacement — causing either a visible gap, sensor contact failure, or permanent display damage if forced. Our cells are manufactured to ±0.1mm dimensional tolerance. This is not a marketing claim — it’s a measurable production spec that determines whether a Watch repair ends cleanly or generates a comeback.
Modèles compatibles vérifiés :
| Appareil | Taille | Identifiants de modèle Apple | Référence de la batterie | Capacité |
|---|---|---|---|---|
| Apple Watch Series 5 | 40mm | A2092, A2157 | A2277 | 245 mAh |
| Apple Watch Series 5 | 44mm | A2093, A2094, A2156 | A2181 | 296 mAh |
| Apple Watch SE (1st Gen, 2020) | 40mm | A2351, A2352 | A2277 | 245 mAh |
| Apple Watch SE (1st Gen, 2020) | 44mm | A2353, A2354 | A2181 | 296 mAh |
⚠️ Not compatible with Apple Watch SE 2nd Gen (2022) — different battery P/N. Not compatible with Series 4 — while the form factor is similar, Series 4 uses A1975 (40mm) and A1976 (44mm), different P/Ns. Always verify the exact Watch model number before ordering.
Paramètres techniques
| Paramètre | 40mm (A2277) | 44mm (A2181) |
|---|---|---|
| Référence de la batterie | A2277 | A2181 |
| Appareils compatibles | Watch S5 40mm, Watch SE 40mm | Watch S5 44mm, Watch SE 44mm |
| Tension nominale | 3,82 V | 3,82 V |
| Capacité | 245 mAh | 296 mAh |
| Type de cellule | Batterie Li-ion polymère souple (Grade A) | |
| Tolérance dimensionnelle | ±0.1mm (critical for OLED re-seating) | |
| Tension de charge (max.) | 4,35 V ± 0,05 V | |
| Coupure de décharge | 2,75 V | |
| Cycle de vie | ≥ 600 cycles @ 80% DOD | |
| Température de fonctionnement | 0°C ~ 45°C (charge) / -20°C ~ 60°C (décharge) | |
| Type de connecteur | Connecteur flexible compatible OEM | |
| Protection (PCM) | Overcharge / over-discharge / short circuit | |
| Sensor Compatibility | ECG, heart rate, blood oxygen — full function preserved | |
| Certifications | Certifications CE, FCC, RoHS, UN38.3 ; fiches de données de sécurité (FDS) disponibles sur demande. | |
| OEM/ODM | Étiquette/emballage personnalisé à partir de 200 pièces par variante | |
| Condition | Neuf, 0 cycle, capacité testée 100% | |
| Garantie | 12 mois à compter de la date d'expédition | |
| MOQ | 50 pcs per variant (mixed orders accepted) | |
| Délai de livraison (en stock) | 3 à 5 jours ouvrables | |
Besoin d'un plan d'approvisionnement stable ? Envoyez-nous la liste des modèles, les quantités et la destination. Nous vous confirmerons le délai de livraison, le mode d'expédition et les documents de conformité avant que vous ne passiez commande.
Caractéristiques et avantages
✅ 📐 ±0.1mm Dimensional Tolerance — OLED Display Protection
The Watch housing leaves virtually no clearance for thickness variance. An oversized cell prevents the OLED display from re-seating, which either cracks the display under pressure or leaves a visible gap that fails water resistance. Repair shops generating OLED damage complaints on Watch battery replacements are almost always using out-of-tolerance cells. Our ±0.1mm spec is held across production batches — not just first-article samples.
✅ ❤️ Full Sensor Functionality Preserved Post-Replacement
Apple Watch S5 and SE include ECG, heart rate, and blood oxygen sensors. These sensors do not require battery calibration, but they do require the battery to make correct electrical contact with the Watch main board after installation. Dimensional accuracy and connector seating are the variables. Our cells fit correctly — no sensor errors, no “ECG unavailable” warnings post-replacement.
✅ 🔋 Both Size Variants Stocked — 40mm and 44mm
A2277 (245mAh, 40mm) and A2181 (296mAh, 44mm) are stocked as separate SKUs but available in a single order. Repair distributors serving shops that handle both Watch sizes can fulfill from one supplier and one shipment without split MOQ requirements.
✅ 🏭 Custom Labeling and Retail Packaging from 200 pcs
Private label on the cell and branded retail packaging available from 200 pcs per variant. For repair distributors building branded smartwatch repair kit product lines, the S5/SE battery is one of the higher-volume Watch battery SKUs currently in the repair market.
Emballage et livraison
Délai de livraison et expédition
Articles en stock : expédiés sous 3 jours
Pour les modèles de remplacement standard disponibles en stock.Commandes en gros : expédition sous 7 jours
Pour les modèles standards, sous réserve de spécifications et d'exigences d'emballage confirmées.Commandes personnalisées : expédition sous 15 jours
Pour une configuration de cellule personnalisée, taille, câblage/connecteur, PCB/BMS, étiquetage ou emballage.
Note: Le délai d'expédition final dépend de quantité totale, complexité du modèle, exigences d'emballage et documents de conformité d'expédition. Nous vous confirmerons la date d'expédition estimée (ETD) après confirmation de la commande.
Fret aérien (urgent, petit volume)
Transport maritime (économique pour les commandes en gros)
Transport ferroviaire / routier (selon la destination)
Chaînes express
Documents disponibles : UN38.3 / FDS / Rapport d'essai de transport (le cas échéant)
L'emballage conforme et l'étiquetage des cartons peuvent être réalisés en fonction du mode d'expédition choisi.
EXW / FOB / CIF / DDP disponibles
Un seul fournisseur pour l'écosystème Apple complet
-Rationalisez votre chaîne d'approvisionnement. Regroupez vos commandes de batteries pour MacBook, iPad, iPhone et Apple Watch en un seul envoi afin de réduire les coûts logistiques et de maximiser vos marges de vente en gros.
FAQ
Q1: Does the A2277/A2181 battery fit both Apple Watch Series 5 and Apple Watch SE?
A: Yes. Apple Watch Series 5 (40mm) and Apple Watch SE 1st generation (2020, 40mm) share battery P/N A2277 (245mAh). The 44mm variants of both devices share A2181 (296mAh). Not compatible with Apple Watch SE 2nd Gen (2022) — different P/N. Not compatible with Series 4 despite the similar chassis — Series 4 uses A1975/A1976. Always confirm the exact Watch model number, not just the case size, before ordering.
Q2: Why is dimensional tolerance specifically critical for Apple Watch battery replacement — more so than for iPhone or iPad?
A: The Watch housing has almost no clearance margin between the battery and the OLED display assembly. A cell that is 0.15–0.2mm thicker than spec creates enough pressure during reassembly to crack the OLED, delaminate the display, or prevent the crown seal from engaging correctly. Unlike iPhones where a slightly thicker battery might just bow the back cover, the Watch enclosure is rigid metal with no flex tolerance. This is why Watch repairs have a higher damage rate with out-of-tolerance aftermarket cells. Dimensional precision is the primary quality variable for this SKU — not capacity.
Q3: Will ECG and blood oxygen sensors work normally after replacing the Apple Watch S5 battery?
A: Yes, when the battery is installed correctly. ECG, heart rate, and SpO2 sensors do not communicate through the battery — they operate via the Watch’s main board and back glass sensor array. What can cause sensor errors post-replacement is incorrect battery seating: a poorly connected flex connector or an out-of-tolerance cell that shifts the internal component alignment. With correctly spec’d cells and proper installation, all sensors resume normal function. watchOS does not require sensor recalibration after a battery replacement.
Q4: How long does an Apple Watch S5 or SE battery last after replacement?
A: Apple’s published battery life for both the Series 5 and SE (1st Gen) is 18 hours under typical use — a mix of app usage, notifications, and workout tracking with heart rate on. A properly installed replacement cell restores runtime to that spec. Real-world figures depend heavily on Always-On Display usage (Series 5 only), GPS workout frequency, and notification volume. The battery itself is not the limiting variable with a new cell; usage pattern is.
Q5: What is the difference between the A2277 and A2181 — can they be substituted?
A: No. A2277 (245mAh) is physically sized for 40mm Watch cases; A2181 (296mAh) is physically sized for 44mm cases. They are different dimensions, different capacities, and different connectors. Installing the wrong size will result in fitment failure — the cell will either not fit or the connector will not reach the board. Always match the battery P/N to the Watch case size before installation.
Q6: What is the recommended installation temperature for the heat-softening step, and does your battery packaging account for Watch-specific repair tooling?
A: The standard recommendation for softening Apple Watch display adhesive is 70–80°C applied evenly for 60–90 seconds using a heat pad or heat gun with temperature control. Higher temperatures risk OLED damage; lower temperatures leave adhesive insufficiently softened and increase separation force, raising the risk of cracking the display. Our packaging includes the battery with protective wrapping suited for the Watch’s compact form factor. We can include Watch-specific tooling (suction handle, plastic opening picks, replacement adhesive strip) in OEM kit configurations from 200 pcs on request.
