Amazon.com: [520mAh] Battery for Samsung Gear S3 Frontier(SM-R760) and Gear S3 Classic, (2023 New Version) Upgrade Replacement Battery for SM-R770, BR760, R765, EB-BR760ABE, GH43-04699A with DIY Repair Tool Kits : Cell Phones
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
Samsung Original Replacement Battery Eb-br760abe For Samsung Gear S3 Frontier / Classic Smart Watch Sm-r760 Sm-r770 Sm-r765 - Mobile Phone Batteries - AliExpress
Amazon.com: WAVYPO Battery for Samsung Gear S3 Frontier SM-R760 and Gear S3 Classic, 520mAh 3.85V Battery Replacement for SM-R770 BR760 R765 EB-BR760ABE GH43-04699A with Repair Tools kit : Cell Phones & Accessories