Specifications:Color: Red， BlueType: Rechargeable li-ion batteryModel: 18650Voltage: 3.7VCapacity: 5000mAh Quantity: 10 pcsSize: Approx. 6.6 * 1.8cm / 2.6 * 0.7in (Height * diameter)Weight: Approx. 350g / 2.7ozPackage List:10 * 18650 Rechargeable Li-ion Battery