Brand SingFire Color Green Material Lithium Quantity 1 Type Lithium Ion Model 18650 Mark Capacity 8800 Actual Capacity 8000 Battery Voltage 4.2 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 Batteries Pack Interface: DC5.5*2.5 Female(Four batteries in parallel) Keywords rechargeable lithium batteries Packing List 1 x18650 Green rechargable batteries pack(47cm-cable) 1 x Batery bag