Introduction， this lamp uses environmentally friendly and efficient maintenance-free imports of lithium-ion polymer battery， with ultra harsh environment， and energy-saving LED light technology， carefully designed and manufactured in accordance with the relevant standards. Emitting source imported LED， with high luminous efficiency， no heat loss， LED long life， permanent free-for-bulb， standard battery voltage is 3.7V， standard capacity battery is 2200mAh， 8 hours of continuous illumination light， weak 15 hours of continuous light illumination time， the normal charging time 8-12 hours， battery charge and discharge up to 600 times， is tapping， pick vegetables， adventure， fishing， underground construction， camping is a good helper.