We are proud to release our new keychain light M2 - the brightest light of similar size and the smallest light with this lumen in the market.
As small as one CR123A vs 200 lumens.
Most key chain lights in the market of similar size use button batteries. However, with a built-in 200mAh rechargeable li-ion battery, the run time of M2 is about twice of them.
M2 can be repeatedly charged for 500 times, which equals to 400*AAA batteries.