The BC4 with Charger by Xtar is a versatile and effective charger for rechargeable batteries of type Li-Ion, Ni-Cd, and Ni-MH. It is capable of charging batteries quickly and safely, with an intelligent microprocessor keeping batteries in optimum condition for the longest lifetime. It is also equipped with a LCD display, allowing you to easily monitor the charging status. Additionally, this charger is powered by USB and includes reverse-polarity protection, effectively preventing any accidents from happening.