... , MP3/MP4, PDA and camera, etc High efficiency solar panel This eco friendly solar charger is rechargeable providing endless energy. It can be ... use, or travel. It is a must have back-up charger needed for mountain trails or emergency occassions. It takes 4 ... : 4.5 - 9V (adjustable) Output current: 1A (max.) Charging time: solar cell phone: 8-10 hours; Discharging time: 3.5 hours ...