Worx, 18V, Cordless Trimmer Replacement Battery, 1.7AH, For Use With Model #s WG150 and WG250.The Worx 18-volt replacement battery is designed for use with cordless electric trimmer models WG150 and WG250. It charges quickly and powers your cordless string trimmer or your cordless hedge trimmer through the entire job, without waning or draining.