The GoPak Cordless Battery is the first 2-in-1 battery that powers your tools and mobile devices. It’s small and compact, so it fits in a pocket or backpack for on-the-go charging. The 2.4 Ah USB output delivers a fast rate of charge. The battery can charge most mobile phones from 0-100% in one charge. 4 LED status lights instantly let you know how much battery charge remains. BLACK+DECKER GoPak Cordless Battery + Charge Cable