Samsung unveils Gear S2 smartwatch lineup with up to 3 days of battery life
Amazon.com: for Samsung Galaxy Gear S2 Classic SM-R735V ,Compatible with 3G R730,R730A,R730T,R735,R735A,R735T,R600 Replacement Battery, for EB-BR730ABE Battery with Adhesive Tape Tool Repair Kit : Cell Phones & Accessories
The Gear S2 is getting improved battery life in surprise firmware update - SamMobile
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