Once you juice it up wirelessly atop a myGrid inductive charging slab, Duracell's new $35 myGrid USB charger will power pretty much anything that has USB, including smartphones (~4 hours), MP3 players (~30 hours), and ebook readers (~100 hours).
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The Lithium-ion rechargeable battery is tiny for travel-friendliness—it occupies the top left of the myGrid in the photo above—and can be charged via USB if you don't have your myGrid handy. It'll be available before the holiday for $35 to extend all your new gadgets' lives. [Duracell]