i followed the steps from this post on US samsung forum and it works at least until now: https://us.community.samsung.com/t5/Wearable-Tech/Battery-drain-on-gear-sport/m-p/409407/highlight/true#M38573 1) Hard reset gear sport 2) Clear cache and data on both Galaxy Wearable and Gear S Plugin app (Settings --> Apps --> Galaxy Wearable/Gear S Plugin --> Storage --> Clear Cache --> Clear Data --> Select "Delete") 3) Uninstall both Galaxy Wearable and Gear S Plugin app 4) Restart you phone (optional) 5) Install Galaxy Wearable from Galaxy Apps 6) Pair your Gear Sport and wait until everything finished 7) Check version of Galaxy Wearable and Gear S Plugin: 1. Galaxy Wearable from Galaxy Apps: 18.104.22.16880361 2. Gear S Plugin : 2.2.03.18083051 My watch drains normally now. and I don't update the watch apps just in case the apps was causing it. and I also disable the sleep notification and diagnostic reports too. Hope this helps.
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