BLACK+DECKER LCC300 20V MAX Lithium Ion String Trimmer and Sweeper Combo Kit 20-Volt MAX Lithium Ion battery has a longer lifespan and retains its charge 5X more than similar Nicd batteries Two-Tools-in-One: Trimmer easily converts to edger to cut along sidewalks and driveways String trimmer features an exclusive Gear Drive transmission Sweeper is light and powerful and easily clears debris from hard surfaces The Automatic Feed Spool ensures continuous work without bumping