The M18™ Power Source, Compatible With Both M18™ Compact and XC™ Battery Packs, Features A Powered Usb Port to Charge Cell Phones, MP3 Players, Digital Cameras, and Other Portable Electronic Devices. This Adapter Is Also Compatible With M12™ Heated Jackets, Providing Up to 18 Hours Of Continuous Heat On A Single Charge With An XC™ Battery Pack.