Amazon.com: MAXSHARKS Fit for Gear S4 Battery 42mm Galaxy Watch Battery New Replacement Battery EB BR880ABY for Samsung Galaxy Watch 4 40mm SM Mobile Battery Compatible with Samsung Core Prime J2 2015 J2 SM Samsung Smartwatch Parts iFixit Jcb Watch Battery Assorted 15 Pack (past Bb Date) Stewart and Gibson Ltd. 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