It works. It works just fine. But the amount of power this solar panel puts out is barely enough to charge a small tablet. After over an hour plugged in and directly facing the sun, the battery in my 7 inch Samsung tablet hasn't moved. Not even 1%. And it can't even charge more than one device at a time. If you have a small phone and all day, you might get a useful charge. Honestly though, if you need to charge a small device because you're camping or whatever, you'd be better off just buying a USB battery. It'll be cheaper, work better, and be much more portable.