it will take the solar energy as the main source and uses the lithium battery ... lightweight and thin design makes it much moreconvenient to be used in some certain situation, such as field trip,camping, night ... an ideal charge power supply,so it can be widely used in mobile phone,camera,MP3,MP4 . For example, we ... : -10 ºC to +40 ºCLuminous flux: 125lm 36 LEDS multifunctional Solar Power Sensor Lamp