This is a nifty trick that one of my friends taught me. I think it is important for anyone to know, especially if they are in a dire situation and their cellphone is dead. It is better to know something and not need it, then need something and not know how to do it.
2010-05-23 9:52pm PDT
You did not charge your cell phone battery with static electricity. That is impossible without having a system that converts high voltage, very low current static discharges into low voltage and moderate current. The converting device would have to be connected to both poles of the battery. What you did was warm your battery by friction. Battery power is temperature dependent, and hot batteries work better than cold ones. By heating the battery, you increased its efficiency, and the small amount of charge remaining could power the phone for a few minutes. You could accomplish the same thing by putting the battery in a cup of hot water for a minute or so, drying it, and placing it back in the phone.