A couple weeks ago, our friend Joel at Boing Boing Gadgets naively trekked into the New Jersey backcountry to survive off the grid for a couple days. To help get him through his technology addiction, he brought along the Brunton Solo 15 ($650), a rugged, rechargeable battery that can power any device you pack. Weighing in at 4 pounds, the Solo 15 offers a max of 77 watts that'll keep you Twittering and Flickring for days. There's also the Solo 7.5 ($373), which offers a little less power. Since there's no outlets in the woods, you'll need to also order a Brunton portable solar panel if you plan to stay AWOL for a while. Choose from the foldable Solaris 52 ($1,300) or the Solaris 26 ($620).