Why does my iPhone battery keep draining quickly?

My iPhone keeps losing heaps of battery in a short space of time. Why is this?

Thats how sadly products from Apple are. Its mostly because you havent closed your apps properly and are still active

Sometimes the apps are not closed properly.

Its probably because you have too many apps opened.
Download Battery Doctor, its a great app for your battery life.

You need to make sure your apps are closed properly

> tap the home button twice and a row of app icons will appear at the bottom of the screen
> then press and hold on the apps (like you would if you were deleting the apps)
> when the apps star moving, a little red cross will appear in the corner of each app ( like when you delete an app)
> then click the cross on each app that appeared on the bottom of your screen

this website might explain better than me