With the Hikoki UC18YSL3WAX3 booster pack charging set, you maintain a continuous workflow on the jobsite without downtime. This high-performance set includes three Multivolt Li-ion batteries that automatically switch between 18V (5.0Ah) and 36V (2.5Ah), delivering up to 1080W of maximum power. This lets you power standard cordless tools and heavy-duty machines interchangeably. Having three battery packs ensures a seamless rotation while one is charging. The included UC18YSL3 fast charger delivers an 8A charging current for rapid turnaround and features a built-in power bank function to charge mobile devices via USB.