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 review: giving a full-on phone-on-a-watch a third go - CNET
9 Tips To Prolong Battery Life On the Gear S3 (Tizen 3 0 Battery Drain)) - YouTube
Samsung Gear S3 - 10 Tips to increase battery life of your smart watch! - YouTube
Samsung Gear S3 Frontier Review: Why It's (Almost) the Best Smartwatch | Tom's Guide