| Specs | Battery Type | AAA Li-ion battery |
| Application | For Apple watch S4 44mm (A2059) | |
| Battery Cell | High quality Grade A pure Cobalt battery cell | |
| Capacity | 291.8mAh | |
| Cycle Time | 300~500 times | |
| Nominal Voltage | 3.81V | |
| Limited charge Voltage | 4.35V | |
| PCBA Board | Mulong made or Original for option | |
| Main chips | Accurate power control gas gauge IC | |
| Charging time | 1~3 hours | |
| Standby time | 1~3 days | |
| Working temperature | -10~60℃ | |
| Safety | Dual ICs protection | |
| Color | Matte black | |
| Certificates | CE, RoHS etc. | |
| Warranty | 12 months | |
| Terms&Condition (Neutral printing) | MOQ | 20pcs |
| Package | battery adhesive/pc (free of charge), Sponge holder+white box | |
| Lead Time | 3~5 days | |
| Terms&Condition (OEM/ODM) | MOQ | 50pcs |
| Package | battery adhesive/pc (free of charge), Sponge+white box or customized giftbox | |
| Lead Time | 5~7 days |
| Apple watch battery compatible model numbers | |||
| Model No. | Rated voltage (V) | Rated capacity (mAh) | Compatible model |
| Battery for iWatch A1578 | 3.8V | 205mAh | S1/38mm Apple watch |
| Battery for iWatch A1579 | 3.78V | 246mAh | S1/42mm Apple watch |
| Battery for iWatch A1760 | 3.77V | 273mAh | S2/38mm Apple Watch |
| Battery for iWatch A1761 | 3.8V | 334mAh | S2/42mm Apple Watch |
| Battery for iWatch A1848 | 3.82V | 279mAh | S3-Cellular/38mm Apple Watch |
| Battery for iWatch A1850 | 3.82V | 352mAh | S3-Cellular/42mm Apple Watch |
| Battery for iWatch A1847 | 3.81V | 262mAh | S3-GPS/38mm Apple Watch |
| Battery for iWatch A1875 | 3.82V | 342mAh | S3-GPS/42mm Apple Watch |
| Battery for iWatch A2058 | 3.81V | 224.9mAh | S4/40mm Apple Watch |
| Battery for iWatch A2059 | 3.81V | 291.8mAh | S4/44mm Apple Watch |
| Battery for iWatch A2277 | 3.85V | 245mAh | S5/40mm Apple Watch |
| Battery for iWatch A2181 | 3.81V | 296mAh | S5/44mm Apple Watch |
| Battery for iWatch A2345 | 3.85V | 265.9mAh | S6/40mm Apple Watch |
| Battery for iWatch A2327 | 3.85V | 303.8mAh | S6/44mm Apple Watch |
| Battery for iWatch A2663 | 3.85V | 284mAh | S7/41mm Apple Watch |
| Battery for iWatch A2552 | 3.85V | 309mAh | S7/45mm Apple Watch |
