Makita 18V LXT Heated Jackets can help you keep warm in cold, harsh job site conditions. Get the right replacement part for your Makita Heated Jacket (sold separately) with the 18V LXT Power Source with USB Port. It is compatible with Makita 18V LXT batteries including 2.0Ah (BL1820), 3.0Ah (BL1830), 4.0Ah (BL1840), and 5.0Ah (BL1850), and provides up to 28 hours of run time when used with an 18V LXT 5.0Ah battery (sold separately). The Power Source includes a USB port that is compatible with most portable electronic devices.