... LED lights (20 hours life on full battery) Battery - Type: Rechargeable lithium battery - Capacity: 2600mAh - Output Voltage: 3.7v, 4.2v, 5.5v, 9v - Output ... panel LED Indicators- Battery status (25 %, 50%, 75%, 100%) - USB connection - Solar charging Input / Output / Buttons- Voltage switch: 3.7v, 4.2v, 5 ...