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Here’s a way for the on-to-go gadget freak to stay powered up: As part of their equator of green products, Office Depot is sacrifice the Voltaic course of bags. Like the Voltaic Converter pictured here, the knapsacks and messenger bags (by prices ranging from $179 to $219) sport waterproof solar panels that produce up to 4 watts of power for whatever gadgets you happen to be toting around. There’s also a lithium-ion battery pack for storing any extra juice, such you can charge your devices even on cloudy days. If you’re looking for a little extra eco-karma, the bags are largely made of recycled soda bottles.

Passers-by might do a double take when they regard the shiny panels on the bags, but don’t lease it concern you — you’re walking away from them, anyway.