Did You know that you can charge your cellphone using your own bodies electrical current.
By making a simple capacitor using common items found in your pocket you will never need a cellphone charger again if you are so inclined.
First you will need two silver coins, a paper clip, a piece of paper, your charging cable and of course your phone.
It works when the electricity from your body is stored in the capacitor and then sent to the phone to charge it. The coins act as a two plates of a capacitor and the air gap and the paper act as the insulator (dielectric). The paper clip is to connect inside of your usb connector to the outer plate of the capacitor.