Apple Watch Series 6 Battery A2345 / A2327 | 3.85V 40mm 265.9mAh & 44mm 303.8mAh Replacement — AOD & SpO2 Compatible
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✅ Fits Apple Watch Series 6 (40mm & 44mm) — P/N A2345 (40mm, 265.9mAh) and A2327 (44mm, 303.8mAh); 3.85V nominal
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✅ ±0.1mm dimensional tolerance — OLED-safe installation; rigid metal Watch enclosure leaves no margin for oversized cells
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✅ Full AOD (Always-On Display) and SpO2 (blood oxygen) sensor compatibility preserved post-replacement
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✅ Factory direct — both size variants in stock; custom labeling from 200 pcs; 12-month warranty; DOA < 0.3%
Descrição do produto
he Apple Watch Series 6 (2020) introduced two features that made it the most power-demanding Watch generation at launch: Always-On Display (AOD) and the blood oxygen (SpO2) sensor. AOD keeps the display partially active at all times; SpO2 performs periodic background measurements. Both draw continuous low-level power from the battery — which means a degraded or sub-spec replacement cell will show runtime shortfall on this model more noticeably than on earlier Watch generations without these features.
The S6 uses two distinct battery P/Ns by case size: A2345 (265.9mAh) for the 40mm variant and A2327 (303.8mAh) for the 44mm variant. Voltage is 3.85V nominal — a slight increase over the 3.82V used in Series 5 / SE (1st Gen). This difference is relevant for PCM spec: the overcharge cutoff on S6 batteries is calibrated to the higher nominal voltage profile. S5 and S6 battery PCMs are not interchangeable, even though the case sizes appear similar.
Modelos compatíveis verificados:
| Dispositivo | Tamanho | Apple Model IDs | Número de peça da bateria | Capacidade |
|---|---|---|---|---|
| Apple Watch Series 6 | 40mm | A2291, A2292, A2293, A2294 | A2345 | 265,9 mAh |
| Apple Watch Series 6 | 44mm | A2265, A2266, A2375, A2376 | A2327 | 303,8 mAh |
⚠️ Not compatible with Apple Watch Series 5 (uses A2277/A2181 at 3.82V) or Series 7 (different form factor). Despite similar case dimensions to S5, the voltage spec and PCM are different. Always verify Watch model number and generation before ordering.
Parâmetros técnicos
| Parâmetro | 40mm (A2345) | 44mm (A2327) |
|---|---|---|
| Número de peça da bateria | A2345 | A2327 |
| Modelos compatíveis | A2291, A2292, A2293, A2294 | A2265, A2266, A2375, A2376 |
| Tensão Nominal | 3,85V | 3,85V |
| Capacidade | 265,9 mAh | 303,8 mAh |
| Tipo de célula | Li-ion Polymer soft-pack (Grade A) | |
| Dimensional Tolerance | ±0.1mm (OLED re-seating critical) | |
| Charge Voltage (Max) | 4.35V ± 0.05V | |
| Discharge Cut-off | 2,75V | |
| PCM Spec | 3.85V profile — NOT interchangeable with S5/SE (3.82V) | |
| Sensor Compatibility | AOD, SpO2, ECG, heart rate — full function preserved | |
| Ciclo de vida | ≥ 600 cycles @ 80% DOD | |
| Temperatura de operação | 0°C ~ 45°C (charge) / -20°C ~ 60°C (discharge) | |
| Tipo de conector | OEM-compatible flex connector | |
| Protection (PCM) | Overcharge / over-discharge / short circuit | |
| Certificações | CE, FCC, RoHS, UN38.3; MSDS/SDS on request | |
| OEM/ODM | Custom label / packaging from 200 pcs per variant | |
| Doença | Brand new, 0 cycle, 100% capacity-tested | |
| Garantia | 12 months from shipment date | |
| Lead Time (Stock) | 3–5 business days | |
Precisa de um plano de fornecimento estável? Envie sua lista de modelos, quantidades e destino. Confirmaremos o prazo de entrega, o método de envio e os documentos de conformidade antes de você fazer o pedido.
Características e vantagens
✅ ⚡ 3.85V Spec — Higher Than S5/SE, Requires Correct PCM
Series 6 increased nominal voltage from 3.82V (S5/SE) to 3.85V. The PCM overcharge cutoff is calibrated accordingly. Using a Series 5 battery or a generic 3.82V PCM in an S6 results in incorrect charge termination — the cell will either undercharge or, in worst-case PCM failure, overcharge. Our S6 cells are PCM-matched to the 3.85V profile specific to this generation.
✅ 🫀 AOD and SpO2 Sensor Functionality Preserved
Always-On Display and blood oxygen measurement are the defining features of Series 6. Both are continuous background power draws — AOD never fully shuts off the display; SpO2 samples blood oxygen periodically without user interaction. A sub-capacity cell will fail to sustain Apple’s published 18-hour runtime under these loads. Our cells deliver rated capacity from the first charge cycle, tested individually before shipment.
✅ 📐 ±0.1mm Dimensional Tolerance — Critical for the Watch Enclosure
The Series 6 uses the same rigid aluminum or stainless steel enclosure as S5 with no flex tolerance for battery thickness variance. An out-of-tolerance cell prevents OLED re-seating and risks crown gasket failure, which affects water resistance rating. Dimensional control at ±0.1mm is a production requirement, not an optional spec — and it applies to every batch, not just first-article sampling.
✅ 🏭 Both Variants in Stock — OEM Kit Options Available
A2345 (40mm) and A2327 (44mm) are stocked separately and available in a single order. Custom labeling and retail packaging available from 200 pcs per variant. For repair distributors building branded Watch repair kit lines, S6 remains one of the higher-volume smartwatch battery SKUs in active repair demand.
Embalagem e entrega
Prazo de entrega e envio
Produtos em estoque: Envio em até 3 dias
Para modelos de substituição padrão com estoque disponível.Encomendas de produção em massa: Envio em até 7 dias.
Para modelos regulares, de acordo com as especificações e requisitos de embalagem confirmados.Encomendas personalizadas: Envio em até 15 dias.
Para configuração personalizada de células, tamanho, fios/conectores, PCB/BMS, etiquetagem ou embalagem.
Observação: O tempo final de despacho depende de quantidade total, complexidade do modelo, requisitos de embalagem e documentos de conformidade de envio. Confirmaremos a data estimada de envio (ETD) após a confirmação do pedido.
Frete aéreo (urgente, volume menor)
Frete marítimo (custo-benefício para grandes volumes)
Ferrovia / Rodovia (dependendo do destino)
Canais expressos
Documentos disponíveis: UN38.3 / FISPQ / Relatório de Teste de Transporte (se aplicável)
A embalagem e a rotulagem das caixas de acordo com as normas podem ser providenciadas com base no método de envio escolhido.
EXW / FOB / CIF / DDP disponíveis
Solução completa para todas as necessidades do ecossistema Apple em um só lugar.
- Otimize sua cadeia de suprimentos. Consolide seus pedidos de baterias para MacBook, iPad, iPhone e Watch em um único envio para reduzir custos logísticos e maximizar suas margens de lucro no atacado.
Perguntas frequentes
Q1: Does the Series 6 battery fit Apple Watch Series 5 or SE?
A: No — and the distinction matters technically, not just physically. Series 5 and SE (1st Gen) use A2277/A2181 at 3.82V nominal. Series 6 uses A2345/A2327 at 3.85V. The PCM overcharge cutoff profiles are calibrated to different voltages. Substituting a 3.82V battery in an S6 will result in the cell terminating charge earlier than intended, reducing usable runtime. Always match the battery to the exact Watch generation.
Q2: Will Always-On Display work normally after replacing the Series 6 battery?
A: Yes. AOD is a display and software feature — it does not depend on battery type, only on battery capacity being sufficient to sustain continuous partial-display operation. Apple’s published AOD battery life for S6 is 18 hours. A correctly installed replacement cell at rated capacity maintains that runtime. Where AOD runtime falls short post-replacement, the cause is almost always a sub-capacity cell, not an incompatibility issue.
Q3: Does blood oxygen (SpO2) sensor function depend on the battery replacement quality?
A: Indirectly, yes. The SpO2 sensor’s accuracy depends on stable voltage delivery during measurement — the sensor uses LED arrays that require consistent current. A cell with high internal resistance (common in sub-grade aftermarket batteries) can cause voltage sag during SpO2 measurements, producing measurement errors or “Unable to measure” warnings. Correctly spec’d Grade-A cells with low internal resistance avoid this. The sensor does not require recalibration after replacement.
Q4: What is the dimensional requirement for Series 6 battery replacement, and why does it matter?
A: The Series 6 uses the same rigid aluminum or stainless steel enclosure as S5 — no flex in the housing. Battery thickness must be within ±0.1mm of spec. An oversized cell (even 0.15–0.2mm thick) prevents the OLED display from re-seating flush, risks cracking the display under reassembly pressure, and compromises the crown seal’s water resistance rating (IP6X dust / 50m water resistance on S6). Dimensional control is the primary quality variable for Watch battery SKUs.
Q5: How does the S6 battery differ from the Series 7 or Series 8 — are they interchangeable?
A: No. Series 7 (2021) introduced a larger case with a different internal layout and different battery P/Ns (A2425 for 41mm, A2424 for 45mm). Series 8 uses yet another set of P/Ns. Despite Apple’s Watch lineup sharing a general form factor family, battery dimensions, connector routing, and PCM specs change across generations. S6 batteries (A2345/A2327) are specific to the 2020 Series 6 and are not physically compatible with S7, S8, or later models.
Q6: What is the lead time for bulk orders, and are both 40mm and 44mm variants available together?
A: Both A2345 (40mm) and A2327 (44mm) are stocked and available in a single combined order — no split shipment required. Stock orders ship within 3–5 business days. Custom labeling and retail packaging available from 200 pcs per variant. Samples available before volume commitment; buyer covers outbound freight.
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