GreenWorks 21242 G-MAX 40V Li-Ion Cordless String Trimmer with 4ah Li-Ion Battery and Charger Inc. High Performance G-MAX 40V Lithium-Ion Battery delivers fade-free power with no memory loss after charging--inlcudes 4Ah Battery and Charger 13-inch cutting path for quick and easy trimmer with powerful results to cut through the toughest weeds Versatile design with 3-position pivoting head for easy trimming at multiple angles 90 degree rotating head with edging wheel for walk behind edging for versatile use Compatible Only with G-MAX 40V Battery Models 29462 and 29472