Samsung fixing Gear S3 battery life issues in latest update, rolling out now [Update]
Samsung Gear S3 - 10 Tips to increase battery life of your smart watch! - YouTube
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
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Samsung Gear S3 owners reporting poor battery life following latest update