Experiencing severe battery drain on your Gear S3 or Gear Sport? Try this temporary fix - PhoneArena
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
How to Fix a Gear S3 Battery Drain
Here's the temporary fix to the Gear S3 and Gear Sport battery drain issue