... battery Output voltage: DC5.2 V 5000mAh mini solar mobile power charger for tablet pc Features: Large capacity, metal ... to the electric battery capacity to decide, calculation formula is: [mobile power supply capacity] 5000 / X [you electric battery capacity] ... = y [times]) enough for mobile phones, MP3, MP4, PDA, game (PSP), digital camera, outdoor flashlight, head lamp, ...