Turn Makita lithium-ion batteries into a charging port with the 18V LXT Lithium-Ion Cordless Power Source. Mount the ADP05 on to compatible Makita lithium-ion battery and you get two USB (universal serial bus) charging ports. Each USB port delivers 2.1A output (4.2A total output when both USB ports are connected). Rubber covers protect USB ports from dust and water. Conveniently located on/off switch for operator convenience. The built-in clip attaches to a belt or holster. Compatible with Makita 18V lithium-ion batteries with a Star symbol (sold separately).