Apple Watch (42 mm, Original & Series 1) Replacement Battery
Replace a dead or damaged battery for the 42 mm Original or Series 1 Apple Watch with this part.
- For optimal performance, calibrate your newly installed battery: Drain battery below 10%, then charge uninterrupted to 100%.
- This new replacement battery will only fit in the 42 mm Original or Series 1 Apple Watch.
- Apple Watch 42 mm Original (1st Generation) and Series 1
- Models A1554 and A1803
- Excludes Series 2 and Later Models
Apple Part #: A1579
Voltage: 3.78 V
Capacity: 245 mAh
We offer you the lifetime iFixit warranty on many products. All information on our warranty conditions can be found here.