Galaxy watch & Gear S3 rapid battery drain after latest update. - Samsung Community
Just replaced my Gear S3 battery (24$ + 10$ for tools). Excited to get 3+ days back. Links in comments, will report back with new battery life in a few days. : r/GearS3
Original Battery Eb-br760abe For Samsung Gear S3 Frontier / Classic Eb-br760a Sm-r760 Sm-r770 Sm-r765 Sm-r765s 380mah - Mobile Phone Batteries - AliExpress