Apple Watch (40 mm SE, SE 2 Cellular, and Series 5) Battery

Replace a dead or damaged battery in a 40 mm SE, SE 2 Cellular, or Series 5 Apple Watch.

Battery adhesive included.

For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.