Easily the most handy camping product (other than maybe a tent) that I own.

Easily the most handy camping product (other than maybe a tent) that I own.   Read Less

Works great, but has to be outside to work! You will get error messages otherwise. My iPhone 5c would tell me it wasn't compati...  Read More

Works great, but has to be outside to work! You will get error messages otherwise. My iPhone 5c would tell me it wasn't compatible with the device. It is, but the panels have to be outside! Will not work through windows!!!   Read Less

I think my expectations might have been a little unrealistic on this one. 4-stars if you accept its limitations. Requires qui...  Read More

I think my expectations might have been a little unrealistic on this one. 4-stars if you accept its limitations. Requires quite a bit more light than a solar calculator- Unless it's midday and you've got clear skies, don't expect to get much if any charge. Purchased hoping to keep my iPhone charged during a multi-day hiking trip and the intermittent tree cover rendered it mostly useless (phone rapidly alternated between charging and not charging and used up a lot of battery notifying me of this through vibrations). Tested it on a sunny day when I got home and it worked great. Great if no trees and ideal weather, not-so-perfect as an emergency backup.5/5 for cool/geek factor and the fact that it does work if the conditions are right. -1 for being a less-than-ideal solution. In retrospect I'd buy a large external backup battery of equal cost, though this would be a good supplement on extra long trips without power.   Read Less