Why does my phone get warm/hot and why do I have a faster drain on my battery?

[AC Question]

why does my fon get warm/hot and why new faster drain on battery

I have sc2 and had replaced battery once (fon 2yrs old) both old and new battery drain real fast and I am Not a game player, watch movies. I just returned the new battery as it was draining like my old one. also have noted it seems my phone is hotter than usual more often

 

[Rukbat]

Re: why does my fon get warm/hot and why new faster drain on battery

What changes did you make between the time the phone was running right and the time it started acting up? Add or change an SD card? Install an app?