Hand-crank flashlight +soldering + Ben Heck = man-powered HTC EVO 4G charger
Batteries die, and when your phone has a WiMAX antenna plus dual cameras and a gigantic screen, well, those batteries tend to meet their maker sooner than later. Enter hacker extraordinaire Ben Heck with a simple and cheap solution: a hand-powered charger. Ben took an inexpensive flashlight with a crank on it, disassembled it, and ran the leads from the internal motor to his HTC EVO 4G. The exciting (or at least excited) video below is proof that it works, but we're wondering which would die first: the 4G's battery, or your arm after cranking on this thing for an hour or two.
