COMPATIBILITY: This battery only fits for Samsung Galaxy Watch 3 45mm (GPS/4G) SM-R840 SM-R845 series, please carefully confirm your phone model before purchase. Premium Battery Cell Upgrade: Designed with a brand new, original SDI Li-ion cell, this battery ensures top-tier performance, reliability, and extended battery life. Engineered for durability, it delivers a consistent power supply to keep your device running at peak efficiency for longer. Included Adhesive: Battery adhesive is included for effortless installation. Tips: A new battery needs at least three full charging and full discharging cycles to complete the calibration Step-by-step Instruction: The battery comes with a detailed instruction manual to help you walk through each repairing process, you'll find it is an easy task for you to complete the repair yourself Comprehensive Toolkit: The kit has every tool you need for repairing, it's professional, safe and easy to use, help you to perform your repair efficiently GREEN FUSION for Galaxy Watch 3 (45mm) Battery Replacement, EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm (GPS/4G) SM-R840 SM-R845, with Installation Instruction & Repair Toolkit