Solar panel：5V, 1.8W top grade, 25 years life time
Battery：3.7V, 2.2AH rechargeable lithium
Lighting source：1W LED, ultra bright
* Brightness level: 4 levels adjustable
* Lighting time: 13-15 hours on level-I, 10-13 hours on level-II, 8-10 hours on level-III, 6-8 hours on level-IV
* Charging time: 8 hours by AC adapter, or 8-10 hours by sunlight
* Product Size: 175*140*155 mm
* Charging method: by sunlight or by AC adapter
* Optional accessory(1): USB mobile adapter
* Optional accessory(2): AC adapter
