Samsung Gear S3 receives another update that's meant to improve battery life - GSMArena.com news
Samsung includes battery issue fix in revised Gear S3 Tizen 3.0 update - GSMArena.com news
So after I updated to the latest firmware I got extreme battery drain like from 100% to dead within an hour even after replacing the battery. HR sensor is dead wont turn
Samsung responds to Gear Sport and Gear S3 battery drain issues - Wareable