Features:9V 6F22 Li-ion battery.Capacity is up to 600mAh.No memory effect， long battery life.Add a protective plate to prevent anti-wear and short circuit.Stable performance and safe to use.With a plastic box to keep the battery. Specifications:Type: 6F22 Li-ion batteryCapacity: 600mAhVoltage: 9VMax.dischargeable current: 650mAMini.cut-off voltage: 5.5V Quantity: 2pcsItem size: Approx. 4.7 * 2.5 * 1.5cm / 1.9 * 1 * 0.6onItem weight: 27g / 1oz (1pcs)Package size: 5.5 * 5 * 2cm / 2.2 * 2 * 0.8inPackage weight: 65g / 2.3ozPackage List:2 * 6F22 Li-ion Battery