Iphone 5 battery draining badly.

It's a iphone that's the problem. :)

same thing happened to me last summer. the only solution is changing a new battery. you know it is too expensive to go to the after-sale support center. so I bought a battery online that fits iphone5 and I changed it by myself. you know there are manuals online. I just followed them.

Dinz gave good advice. Also, a friend of mine's phone battery started draining faster than usual and the phone would get really hot sometimes. Long story short, her bf had loaded a tracking software on it. The software was running the GPS, the microphone, polling for emails and messages, etc., etc. and sending info back to the tracking software company every 5 minutes!

It could be anything and Alice has mentioned one good example.

Double click your home key and see what applications are running in the background and close them down.

Turn off WIFI and bluetooth when you don't use it.

Screen brightness can consume a lot of battery power so either reduce the brightness or have it on auto adjustment.

If you're in an area where reception is weak or you venture into areas where there is no reception the phone will continuous search for a tower. Try putting the phone into airplane mode.

Your battery might be stuffed so you might need to replace it.

Ive had my iphone 4s for 4 years. I use it a lot through the day mostly internet. I have to charge it 3 times a day, and I plug it in at night and leave it until morning. I was told by an apple man that you shouldn't do this, you should charge it til 100% then take it out if you leave it the battery will drain.

Sort it out apple men!