black+decker lsw221 20v max lithium cordless sweeper (renewed) black+decker the black+decker lsw221 20v max lithium cordless sweeper is ideal for clearing driveways, sidewalks, decks, garages and other hard surfaces of leaves, grass clippings, and other lawn debris. with air speed up to 130 mph, this sweeper easily clears debris from hard surfaces like driveways, decks, and garages. it offers a lightweight design of only 3.7 lbs., and the low noise design allows for quiet operation. this unit operates on a 20v max lithium ion 1.5ah battery that holds its charge for up to 18 months.