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
Buy Original Part Quality for Samsung Galaxy Gear S3 Frontier SM-R760 and S3 Classic Battery Replacement SM-R770 R760 R770 BR760 R765 EB-BR760A,EB-BR760ABE, GH43-04699A, with Full Repair Tools Online in Vietnam. B0819KSZHJ