Mobile Battery Compatible with Samsung Core Prime J2 2015 J2 SM Smartwatch Parts iFixit Battery Vervanging voorWatch Gear S4 42Mm SM R810 R815U EB BR810ABU 1 Samsung Galaxy Watch 4 40mm & 42mm Battery EB BR880ABY Repair Replacem Samsung Smartwatch Parts iFixit Amazon.com: VALBEL Battery Replacement for Samsung Galaxy Watch 4 40mm. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit J2. 048. S Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz Swiss Movement Water Resistance Compatibility: Suitable for 50m Water Resistant Watches Mercury Free: Environmentally Friendly (0% Hg) High Low Temperature Tolerance: Extended Performance in Extreme Climates SKU: J2. 048. S_K0052633