Size: 177*36*30mm   
Charging voltage: 4.5V        
LED lifetime: 100,000 hours(chip form Japan)         
Charging time: 3-5hours    
Lighting time: Strong light 5 hours or more,soft light 90 hours or more.                               
Inner Lithium: 5200mA 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.