GreenWorks 21072 Gen1 20V 12-Inch String Trimmer - 20V Li-Ion 2.6 AH Battery and Charger Inc. (Discontinued by Manufacturer) GreenWorks Gen1 20V Lithium-Ion Battery System offers a complete lawn care solution 12-inch cutting path for easy manuevering around yard .065 auto single line feed for ease of use Easy edger button converts from trimmer to edger with a push of a button for versatile use Compatible Only with Greenworks Gen1 20V 2.6 AH And 6.0 AH Batteries, Model 29612 and 29212 and Charger Model 29247