Brand SingFire Color Blue Material Lithium Quantity 1 Type Lithium Ion Model 18650 Mark Capacity 6400mAh Actual Capacity 6400mAh Battery Voltage 8.4 V Rechargeable Yes Rechargeable Times 500 Buitl-in Protected Circuit Yes Over Voltage Protection Yes Short-circuit Protection Yes Over-charging Protection Yes Over-discharging Protection Yes Mercury Free Yes Application Can be use in bike light headlamp Other Features 18650 rechargeable lithium batteries pack; Batteries pack interface: DC 5.5 x 2.5 female Packing List 1 x 18650 rechargeable batteries pack (44cm-cable) 1 x Battery bag