Amazon.com: ASDAWN A1579 Battery Replacement Compatible with Apple Watch Series 1 42mm A1554 A1579 A1803 with Repair Tool Set + Installation Instruction + Back Cover Adhesive : Cell Phones & Accessories
Amazon.com: oGoDeal A1579 Battery Replacement for Apple Watch Series 1 42 MM A1803 and (1St Generation) Apple Watch Sport A1554 & 7000 Series with Repair Tool Kit : Health & Household
A1578 A1579 A1760 A1761 Battery Replacement For Apple Watch Series 1 2 38mm 42mm Batteries + Free Tools - AliExpress
Apple Watch Series 1 42mm Battery | A1579 (246mAh)