1PC UltraFire 18650 4200mAh 3.7V Li-ion Rechargeable Battery 1PC UltraFire 18650 4200mAh 3.7V Li-ion Rechargeable BatteryBrand: UltraFireSize: 18650Capacity: 4200mAhVoltage: 3.7VMaterial: LithiumDimensions: 6.95cm x 1.88cm x 1.88cm