Ultra Fire 18650 5000mAh 3.7V Rechargeable Li-ion Lithium Battery -5PcsThis?UltraFire?HH 5000mAh Li-ion Rechargeable battery is a high powered li-ion battery that is perfect for demanding electronics such as tactical LED flashlights. These batteries feature 3.7 Volts of power and a top of the line 5000mAh?capacity that will keep high drain electronics running longer than competing power sources. Combined with reliable manufacturing quality and bulk value pricing, the Comaat 18650 is one of the best deals when it comes to li-ion power. High quality and durable, No memory effect; Provides excellent continuous power sources to your device.High performance 18650 5000mAh 3.7V Protection Li-ion Rechargeable BatteryType: 18650ProtectionCapacity: 5000mAhVoltage: 3.7VSystem: Cylindrical Li-ion BatteryGreat for LED flashlights and high drain devicesEquipped with the latest technology for complete safetyHigh quality and durable, No memory effect;Provides excellent continuous power sources to your device