Why does my iPhone lose charge so quickly, even on standby?
A few facts
-iPhone 4s
-almost new condition but I've had it for a year
-I always close the apps completely so I rarely have apps running in the background
-a lot of my apps are set to manual with location services off
-I usually run down the battery on purpose by the end of the night so there's no unnecessary charging (which I'm told can also kill the battery)
Lately it's been running down unusually fast, I wake up, unplug it so its at 100 percent, by the time I get to work probably 2 hours later, I've barely touched it except for the occasional text and one quick read through Facebook and it'll be at 62 percent. Then it's on standby all day, not touched or used, but when I get off work 8 hours later it's completely dead.
It used to be of arrive at work with 96 percent and leave with at least 75 percent. And I try to take good care of it so I'm just a little confused on what could be causing the issue. Any ideas?