This digital battery charger is specifically designed for 18650. With this charger and the 18650 rechargeable batteries, you can save a lot of money using to buy battery. Via using the rechargeable battery and charger, you make a great contribution to the environment. This battery charger is necessary for your devices using the 18650 battery. - 100V-240V Direct Plug-in Power - 4.2V 600mA Charging Current - Charges two 18650 at once The UltraFire BRC 18650 rechargeable Lithium battery is equipped with a protection circuit board (PCB) on the negative pole. The PCB can protect the battery from overcharge, over-discharging, overload and short circuit, which can make the battery safer and longer lifespan. The battery is environment friendly and perfect for super bright flash and other devices. - 18650 cylindrical rechargeable batteries - Actual Capacity: 3.7V 2600mAh - Package contains 2 batteries Pakcage included: 2 x Rechargeable battery 1 x Charger