The Valken 2-3 Cell PRO Compact LiPo Balancing Smart Charger is a smart charger for lithium airsoft batteries and has a built-in safety feature reducing the risk of battery charging mishaps. The lithium charger safety feature will not charge if any cell is below 2.8V. The lithium charger comes with its own power cord, and charges through 3-pin, or 4-pin charging ports. This lithium airsoft charger will safely charge lithium polymer airsoft batteries safely and efficiently. They have a lightweight design, and easy to use. The lithium charger also features reverse polarity and short circuit protection built in, as well as over-charge and over-current protection.