4. Goal Zero Sherpa 100
At less than two pounds, the Sherpa 100 packs plenty of power—enough to charge a laptop twice or your GoPro 18 times—into an incredibly small, easy-to-carry package. Just toss it in your backpack or camera bag along with one of GZ’s super rugged solar panels, and venture off-grid worry-free. Plenty of output options, from two USB’s to an optional AC socket, will keep your camera, GPS or, hell, just about any other gadget juiced.