The thoughtfully designed Makita Power Source Kit Li 18V 5Ah includes 4 lithium-ion batteries. When one battery runs out, you simply connect the next battery to your Makita power tool to continue working. Use the Power Source Kit Li 18V 5Ah as a power source for your Makita power tools. The Makita batteries are compatible with many Makita cordless devices. With Makita cordless power tools, you can work without the hassle of a cable and independently from power sources. This allows for flexible movement, such as when trimming hedges or mowing the lawn. Additionally, you are spared from the unpleasant smell of gasoline.