The Skil Pwr Core 20 Lithium 2.0Ah 20V Usb-C Battery features two-way rapid charging via Usb-C, allowing you to charge the battery or personal devices with its integrated Usb-C port. The 100W Usb-C Pd 3.0 port delivers up to 20X higher power than Usb-A ports to power a wide range of devices.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.