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I have a 6s and not having that battery issue - it is at least as good if not better on 10 than 9. Have you checked setting, battery to see what app is using the most battery for you.
 
Low Power Mode helps a lot. (5C)
Yea but i do need the processing power and the background refresh sometimes so its not the ultimate solution, and iOS 10.1 is all about the Plus iPhones models , so i guess we'll have to wait for iOS 10.2 :/
 
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