Amazon.com: Battery for Apple Watch Series 1 38mm, Wavypo High Capacity Replacement Battery for Watch Series 1 A1578, A1802, A1553 (1st Generation) with Repair Tool Kit : Cell Phones & Accessories
Apple Watch Series 1 Battery Replacement - iFixit Repair Guide
Apple Watch SERIES 1 Replacement Battery 1st Gen- 38MM or 42MM | Phone Remedies – PhoneRemedies
If your Apple Watch screen pops out like this, you could get it replaced for free - SoyaCincau
Apple Watch Series 1 Battery Replacement - PC Expert Services
Apple Watch Series 1 38mm A1578 Battery Replacement - Batteries and Ink