USB Power Source Addon for Makita BJR181X Battery - Phone and USB Devices Charger Accessory for Makita 18V Lithium-Ion Power Tool USB Power Source Addon for Makita BJR181X Battery Battery NOT Included. This is only for the USB Power Source. The USB Power source attaches to your lithium-ion battery and will enable you to charge your phone and other USB devices. USB Power Source Specifications - Input Voltage: 12.8-22VDC; Output: 5V, 2.1A USB Power Source includes 2 USB Ouput to charge your phone and other USB devices. On Sale for a Limited Time!