Technical parameters:

• battery capacity: 4000mAh

• operating temperature :-10℃ ~ 40℃

• use ambient air humidity: < 90%

• charging input: 4.2v         500 ma

• luminous flux: 250Lm

• charging time: 10 hours

• use time: 10/20 hours (strong/weak)

Instructions:

• please read the instructions before using this product and keep it for future reference.

• the charger is connected to the mains power for charging. The red indicator indicates that it is in charging state. The indicator turns green after full charging.

• during use, when the LED lamp is dim, the battery tends to be fully discharged. At this point, to protect the battery, it should stop using and charge in time. (charging should not be done when the LED light is completely out of light, when the battery is vulnerable to damage and failure)

• the headlamp should be used for charging frequently and should not be put aside for a long time. If not frequently used, please recharge every three months after storage, otherwise the battery life will be reduced.