battery drain after rebooting !!! please help me

[TAHASMOBILE]

please help
i have bought this phone (Samsung Galaxy young s6312 ) two days ago and it is very good phone but there is problem that every time i rebooting the device the battery drain 10% -20% or more or some times less !! but some times it increase 5% or more after rebooting !!!
the battery status is good !! so what the problem that make the battery crazy ?! the phone is new !!

i did factory reset and the problem still !! and i used Battery Doctor to clear my ram and this isn't my first android phone but this the only one that don't give me the right battery status !!!

note : the graph of the battery status in android setting show gaps inside the graph refer to the times that i rebooting my phone and lose % from battery life !!!!
also sometimes i use phone and it remain for 20 minutes using WIFI on 70% without fall but then suddenly it fall to 60% !!!!
please help me soon ..what the problem and like i said all battery apps test say that battery status is good !!!!

 

[BWolf56]

please help
i have bought this phone (Samsung Galaxy young s6312 ) two days ago and it is very good phone but there is problem that every time i rebooting the device the battery drain 10% -20% or more or some times less !! but some times it increase 5% or more after rebooting !!!
the battery status is good !! so what the problem that make the battery crazy ?! the phone is new !!

i did factory reset and the problem still !! and i used Battery Doctor to clear my ram and this isn't my first android phone but this the only one that don't give me the right battery status !!!

note : the graph of the battery status in android setting show gaps inside the graph refer to the times that i rebooting my phone and lose % from battery life !!!!
also sometimes i use phone and it remain for 20 minutes using WIFI on 70% without fall but then suddenly it fall to 60% !!!!
please help me soon ..what the problem and like i said all battery apps test say that battery status is good !!!!

First, you're in the wrong sub-forum. http://forum.xda-developers.com/galaxy-y would be closer to your device.

Now for your issue, it's most likely a bad battery. I would suggest getting a new one. You can also try to clear your battery stats (either in recovery or I believe there's an app that does it). Make sure that if you do that though, to make it go through a full cycle without charging or turning it off.

 

[driverless]

The same stuff happened to my Cappy, replacing the battery fixed my problem, I don't know about yours though.