Extend the battery life of your Samsung Gear S3 Smartwatch with these battery saving tips - PhoneRadar
Amazon.com: oGoDeal Replacement Battery for Samsung Gear S3 Frontier(SM-R760) and Gear S3 Classic 3.85V 380mAh Battery SM-R770,BR760,R765 EB-BR760ABE GH43-04699A Battery with DIY Repair Tools : Cell Phones & Accessories
SAMSUNG Original Replacement Battery EB BR760ABE For Samsung Gear S3 Frontier / Classic Smart Watch SM R760 SM R770 SM R765|Mobile Phone Batteries| - AliExpress