battery draining so fast doesnt look like it will stay for 20mins

[AC Question]

my phone battery doesnt even stay upto 30mins i just looked what the problem is im using an android when i went to settings>battery the screen brightness was 33% it shows its in full brightness.. in reality i already have reduced it fully and one of my apps is 33% draining battery even though i ??have already closed it does it have something to do with sync?

 

[VW Maverick]

Welcome.
What device do you have?

Mav.

 

[calyzto]

im using Samsung Galaxy Young Duos GT-S6312

 

[calyzto]

i started looking for answers and came across Mobile Radio Active bug seems to be the problem but i cant find a solution for this