Holds its charge for up to a year so you can use it anytime, day or night.

• Built-in rechargeable lithium polymer batter: 1200mAh/3.7V
• Solar energy board: DC5.OV/ 80mA
• Input Voltage: DC5.0V-5.5V
• Input current: 450mA Max.
• Output Voltage: DC 5.0V
• Output current: 600mA Max
• Cycle life: ›500 times
• Weight: 2.8 oz
• Dimension: 1114.5x101x17mm

Includes charging cable and instructions.