Good news We directly built this 18650 battery inside the flashlight before shipping in order to get more logistics methods to reach more countries Because there may be no mailings to transport pure batteries to some countries So you can try to order in this link Hope you have a happy shopping Specification Product name Astrolux S43S Copper Flashlight 1Pcs Astrolux® E1825 2500mAh 18A 3 7V 18650 Li ion BatteryBrand Astrolux Model S43SEmitter Type 4x XP G3 or 4x Nichia 219CDriver NarsilM V1 3 Peak Beam Intensity 8500 CDLight color 4x XP G3 Cool WhiteNichia 219C Natural WhiteLight Temperature XP G3 6000 7000KNichia 219C 5000KMax Output 2100 LumensRange 184 MetersMode Including Default UI and Alternative UI Detailed operation instructions please see the following 2 instructions Lumens 0 100 LumenRuntime 8 HoursBattery Configurations 1x 18650 or 18350 Battery Included 1X18650 Battery Working Voltage 2 8v 4 25vSwitch Type ClickySwitch Location Side of the flashlightMaterial Aerospace grade aluminium alloyImpact Resistant 1 5 MetersWaterproof IPX6 waterproofCarrying Strap LanyardColor BlackWeight 60g without batterySize 88 7mmx 27mm Lengthx Diameter Feature Functions 4 LED Bulbs Battcheck mode displays battery voltage Lockout lockoff function Charging Indicator USB Rechargeable Removeable tactical safety harmmerFeatures Ultilizes 4xNichia 219C XP G3 LED Max output of up to 2100lumens Boasts a peak beam intensity of 8500 cd and a throw dista