Battery Problem

itz.Manny wrote:

I charge my iPhone every night, but when I use the battery goes down really quickly. Is my battery damaged due to the charging of all night?

No, once the battery reaches 100% it stops charging. There is no damage doing that.

http://www.apple.com/batteries/maximizing-performance/

The link I provided helps with battery.

go to settings - battery and see what app is eating up your battery.