It doesn't look as elegant as the MacBook Air, but Freeplay Energy's Weza Energy Source wins full points for off-the-grid functionality (thanks to GreenDaily).

It features a rechargeable battery that can be plugged in and charged in about 8 hours, or charged up using a foot treadle, which (depending on how the shape you're in)--can produce between 25 and 40 watts.

The Weza can jump-start your car or charge your iPod or other gadgets, as long as you have the old cigarette lighter charger cables. Even better, the Weza is configured so that it can be charged from wind turbines or solar panels. For $300, this power pack seems versatile, tough, and not a bad option if you want to get a little exercise while reducing your electricity bill. Go here for more information.

Originally published on GoodCleanTech.