BLACK+DECKER LSW221 20V MAX Lithium Cordless Sweeper Easily clears debris from hard surfaces like driveways, decks, and garages Air speed up to 130 MPH Operates on a 20V MAX 1.5Ah Lithium Ion battery that holds its charge for up to 18 months Lightweight with a low noise design.Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18 Part of the 20V MAX System