This is a very special high performance LED headlamp! You don't have to change the battery for years of use because this LED headlmap is equipped with a high performance recharged for over 500 times. Recharging time can is 4-6 hours depending on power drain level. And working hours can be up to 12-24 hours depending on the lighting levels you choose. Because of the special plastic formula and artistic structural design, the headlamp is shock resistant and water resistant whick make it suitable for use under normal outdoor conditions.