4S I am still having battery problems

Hello Community,

unfortunately after 5 iPhone 4S and turning off locations, push and everything that drains the battery, I am still having battery issues.

The last two times I let the iPhone completely drain to the point it turns off, I plugged the iPad charger into the iPhone and normally 3 minutes later the iPhone turns back on, but this time it took half an hour to turn back on. That is not normal.

This morning the phone was at 100% as I charged over night. And about 1 hour later when I got to work I was at 78%. I checked Twitter and chatted a little on FB. But that was it.

I really don't know what to do. My family who has 4S too but a different provider does not have these problems at all.

I have 5.1.1 and I often let the battery drain completely to charge it back to 100%. I close my apps regularly. I only use location services for Dropbox and Siri, 3G is on, brightness is down, push is completely off, I hardly make calls. all I do is Twitter, iMessage, FB and Mail.

Any ideas?