Size: 132*36*30mm   
Charging voltage: 4.5V        
LED lifetime: 100,000 hours(chip form Japan)         
Charging time: 2-3hours    
Lighting time: Strong light 4 hours or more,soft light 40hours or more.                                
Inner Lithium: 2600mA battery,Japan                  
ISTB: 9μA                           
ECTEL: 4000 hours           
Echarge:USB connector     
Mobile charging voltage: 5V  
Mobile charging current:1200mA
This product have USB connector, can to be charged . Golden, silver, blue, black,red and so on.