Use 14500 battery or 1 AA copper circuit, stainless steel, demagehead design, high flashlight, ... a maximum of 250 lumens, life 100,000 hours.3, the circuit: using a precision design of the ... dimming circuit, (5 files) with anti-reverse, prevent ... allows the perfect inverted, using candlelight mode; copper circuit warehouse design also more conducive to heat dissipation and ...