The Xtar PB2S BLACK with Charger is a recharging unit specifically designed for Li-Ion rechargeable batteries with a voltage of 3.6/3.7V. It has a 5VDC power output and features two independent channels for charging, with each one compatible with a variety of battery sizes. It features a built-in LCD display to show charging status, battery protection, and other details. This charger is capable of charging up to two batteries at a time and ensures a fast, safe, and efficient charging process.