The MJX 2S 7.4V LiPo Battery USB Charger is a compact balance charger designed for charging 2-cell (2S) 7.4V lithium-polymer batteries commonly used in MJX RC vehicles, drones, and other RC models. It connects to a USB power source and provides balanced charging to help maintain battery performance and cell voltage consistency. Its lightweight and portable design makes it suitable for home use, field charging, and travel applications. The charger is compatible with various MJX, HBX, and FTX models that utilize 2S 7.4V LiPo batteries.