So I just bought a Second Hand iPhone 6s Plus, it was all good but when I use the camera app, it will drain very fast in the first 1-2 minutes of using (6%), after that then the battery drain stops, and in the end a 10 minutes 1080p 60p will result in a 10% battery drain(for me its normal) however the issue is whenever I opened the camera app it will drain like hell and I use snapchat a lot, opening and closing the app regularly and the battery will drain.
This issue also happened when I use Siri, just asking 3 question, it will drain 3 %.
Also the camera app is funny, it focuses slowly(not instant but gradually), and if for example I tap an area to focus, it will focus but if I tap the same area twice it won't refocus anymore and just stay still. is this normal because my friends iPhone 6s if I tap the same area twice it will try to refocus.
I tried restoring via itunes but still no luck, tried turning off location but still the same
Please help
This issue also happened when I use Siri, just asking 3 question, it will drain 3 %.
Also the camera app is funny, it focuses slowly(not instant but gradually), and if for example I tap an area to focus, it will focus but if I tap the same area twice it won't refocus anymore and just stay still. is this normal because my friends iPhone 6s if I tap the same area twice it will try to refocus.
I tried restoring via itunes but still no luck, tried turning off location but still the same
Please help