Guys I have a Prob. Im using j7 2016. Its pretty good sometimes my battery lasts 7 days. Then I got too much unnescessary files. Phones needs cleaning so Fatory reset the phone and installed same apps. And I noticed my battery is draining. I dont turn off any sync etc. But it last 3 days
But...
Guys I need help, at first my battery is doing fine always connected to wi-fi 24/7 galaxy j7 2016 nougat. The problem started when I Factory reset my phone thats when my battery started to drain real fast.