I was at a party yesterday where I think the Battery of my Samsung Galaxy S unloaded completely because it already was at 10% when we started and I looked at the phone some hours later- it was turned off.
Consequently I tried to switch it on but what happened is: It showed the start screen (Samsung Galaxy S etc.), after that a screen with the "Android skateboarding on a rainbow", and finally it turned off and repeated everything.
My phone was rooted and I had Android 4.0.2 installed on it.
PLUS I have a second battery pack- but the same happens when I insert it.
Also if I try to load the phone, a battery load screen appears, but disappears after several seconds and reappears again, and so on.
Now I heard about resetting (didn't work- i pushed home+volume up+power and released after seeing the Samsung screen) and about heating the battery with a hairdryer (did not work either).