The Novothink Surge for iPod Touch ($70) is the most clever of extended batteries. Like the Mophie Juicepack, the Surge is designed to both charge and cradle your iDevice – in this case, 2nd and 3rd generation iPod Touches.

But what makes the Surge noteworthy is the integrated solar panel on the rear – allowing you to top off just about anywhere there’s light. (Supposedly, it’ll even trickle charge via some types of indoor lighting.) Novothink has also created an app to help calculate your solar charging needs. And if you’re pegged at 6 hours, as I was, you can optionally refill at a quicker clip via the included mini USB cable rather than leave the Surge on your dashboard all day (which is frowned upon in the user manual).

Entering the Surge for iPod Touch giveaway is as easy as it gets, simply leave a comment. (US residents in the lower 48 only, please.) We’ll choose the winner at random in a few days.

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