I am using samsung A520 and facing the battery problem my device uses too much  battery on standby,i have puted all the background running apps to sleep but still my phone uses 2 to 3% battery per hour?Any suggestion please for resolving the issue

I am using samsung galaxy A520 and using strange problem of touch. The touch of my device is not working properly i can't touch and hold for more than 4 to 5 secounds e.g i cant play racing game because i can't accelerate my vechile for more than 4 t...