The SKIL PWR CORE 20? Lithium 2.0Ah 20V USB-C Battery is backed by an innovative temperature management system that results in longer runtime and battery life. Each cell is surrounded by revolutionary phase change materials to keep the battery cool and powering through any project. The battery features two-way rapid charging via USB-C, allowing you to charge the battery or personal devices with its integrated USB-C port. Pulsing USB-C port LED lights indicate charging and discharging status, so you can quickly see if your USB-C port is active. The battery is 20 percent smaller than SKIL batteries with a USB-A port, and it powers any SKIL 20V tool in the PWR CORE 20? lineup.