If you've been look for a way to charge your cellphone while getting some minor wrist exercises done
at the same time (don't try and deny it), you might want to check out "Manual Power," the gyroscope
flashlight charger. You pull the starter cord to get the rotor moving, and then make odd wiggling moves to bulk up your
forearm and power a built-in LED flashlight or charge your phone via an adaptor. Buy a few, shut off the lights, and
invite your friends over -- you've got a regular dance party.
[Via The Raw Feed