give me true solution m31s my mobile battery drain and charging slow 1 battery 80% battery used only 7 hrs mobile using time very much of heating issues. 2 charging time 3 hrs in 80% charge full on battery mobile using heavy heating my mobile give t...

my mobile m31s battery drain and charging time battery 2.30 mins movie see battery takes 40% but battery 6000 Mamp same movie see m11 battery takes 20% m11 only 4000 Mamp. charging time takes 3 hrs in 80% give any true result. 

 i give mobile in service center after okay but normally running no standard battery continues down. I 1hrs no using 5 to 10 % down battery in one hour what problems i do no give anybody solution 

M31s mobile charging time take 3 to 4 hrs .give anybody solutions.Heating issue and battery drain problem m31s.Samsung next update??

Very fast drain battery 20mins using 15 percent charge drain what I do no give solutions