The solar panel itself is well-done, and the panel did a very good job of keeping my MP3 player and cell phone charged while I was on the go…. the backpack zippers easily jam when opening and closing; moreover, when zipped, the teeth can easily open with just a little pressure (like when you actually carry something in the bag), causing almost total backpack failure the zipper closures are weak and can easily break (like when trying to unjam the zipper, as noted above). . . . → Read More: Solar Backpack: update


