CRAFTSMAN V20 20-volt Max 13-in Straight Battery String Trimmer with Edger Conversion Capable 2 Ah (Battery and Charger Included) in the String Trimmers department at Lowes.com
DEWALT 20V MAX Cordless Battery Powered String Trimmer Kit with (1) 4Ah Battery & Charger DCST925M1 - The Home Depot