iPhone 4 stuck on charging screen

The story:



Last night, I was in bed listening to music with headphones plugged in. I was listenting to music for awhile and then noticed my iPhone charge was at 7%... before I started, It was at 13%.



So I got up, put it to charge and went to bed (not looking at the screen whats-so-ever).



Waking up this morning,



I found that my iPhone was plugged in and it was at the no charge screen and it was charging.



I tried various things, as listed below:



1. Using my wall charger (Which does work, my other iPhone 4 charges on it)

2. Using wire to laptop

- Restarting laptop with it plugged in

3. Going into DFU mode (Couldn't get to work)

4. Using a different wire (For both wall charger and connecting to laptop)

5. Using a different wall-charger (with two different wires)



That's about it...



Please keep in mind that my battery is perfectly fine, never had a problem. I do not have Apple Care no longer, can't call up or go to store.



By all means, Please try to give me instructions that do not require restoring as my backup is pretty damn old.

Please help with any tips you have!

ATM : I'm trying to drain my battery.