Turn your Makita 12V lithium-ion battery into a charging port with the 12Vmax CXT® Power Source. Mount the Power Source onto your compatible Makita 12Vmax CXT® lithium-ion 2.0Ah or 4.0Ah slide-style battery (sold separately) and you get a USB charging port for portable electronic devices. For added convenience, the built-in clip attaches to a belt or holster. The Power Source can also be used with a 12Vmax CXT® battery to power a Makita 12Vmax CXT® Heated Jacket, including models DCX200, CJ105D,CJ106D and CV102 and more (jacket and battery sold separately) Features a USB port for charging most portable electronics Compatible with Makita 12 max CXT® 2.0Ah battery BL1021B and 4.0Ah battery BL1041B Battery and charger sold separately