The idea is awesome. I've got a battery eater phone and would have it, when I auslaste it properly load probably three times a day. The two solar charger but make it seem not at all to charge the battery. After 2 full days of sunshine, the battery was half full. When I boot it via usb and einstöpsele in my phone, its battery is said to have actually only about half as much capacity, it creates this not, charge it completely. I'm really not happy.