Nitecore
Nitecore NL188 Li-ion reachargeable 3100mAh 18650 battery
18650 Li-ion Rechargeable Battery 3100mAh 3.7V 11.5Wh Ultimate Performance, Accept No Substitute Integrated battery overcharge / discharge protection circuits High discharge performance Li-ion Rechargeable Battery middot; More than 500 charge-discharge cycles.