IPod touch 5g terrible battery!!!

I got my iPod touch 5g replaced a few weeks ago, it had stuck itself in recovery mode and the Genius man told me that it had faulty hardware. Then I got a brand new iPod touch 5g. And this one had TERRIBLE battery. Most of its problem is the camera app! My battery was about 75%, I opened the camera app and took 2 pictures, closed it, killed the app, and when I looked, I had 30% battery!!! So I locked my ipod and waited, and turned it back on and now it had 45% battery!!! This ALWAYS happens to me now!!! I have drained the battery till 20% and charged it for 4 hours yesterday, as someone has suggested to me on another post, and I don't know WHAT to do!!! I don't have Bluetooth on, only one notification is on, no automatic downloads...

This is getting very annoying.