The special feature of this unprotected type 14500 Li-Ion IMR rechargeable battery is the low impedance and its ability to generate high currents. Use of this rechargeable battery therefore increases the maximum output of the Nitecore EA11 from 160 lumens (with battery operation) to 900 lumens. Nominal voltage: 3.7 V. Capacity: 650 mAh. Max. discharge current: 6,5 A. Only UM series Nitecore charges or the Digicharger should be used for charging.