For Samsung Gear S3 Classic SM-R770 NEW EB-BR760ABE Battery Smart Watch+TOOL | eBay
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 Gear S3 Classic Review: The Best Gets Even Better - MySmartPrice