Amazon.com: HDCKU Battery Replacement Kit for Apple Watch Series 1 with Repair Tool Set A1803 and (1st Generation) A1554 42 mm : Cell Phones & Accessories
Replacement Battery For Apple Watch Series SE 1 2 3 4 5 6 7 8 Bateria IWatch S1 S2 S3 GPS LTE S4 S5 S6 S7 S8 38/40/41/42/44/45MM - AliExpress
Apple Watch Series 1 2 3 4 5 SE 6 7 - Battery Replacement (Mail in Service) | eBay