les, i looked on the specs for this radio, it appears to have multiple power sources:

Power Source:
1) Self-Powered Aluminum crank with
Hand Turbine Technology
2) From 3 AAA batteries (not included)
3) AC Power (requires AC to USB adapter, not included)
4) DC Power (charge via included USB cable)

I'm not exactly certain what all that means, very technically challenged these days, but appears it has a usb cable to plug into adapters for either geting power in the car (AC power) or the wall (DC power). DW and DS's I-pods work like this, the USB cables can plug into an adapter for the car or for a standard wall outlet. I'm assuming the AAA batteries are a backup, and the crank is a last resort backup, at least that's how I am looking at it anyway.

just noticed it also has a built-in digital clock and alarm. it could come in handy at scout camp this summer, i am a notorious sleepy head in the mornings