CRAFTSMAN V20 20-volt Max 13-in Straight Battery String Trimmer with Edger Conversion Capable 4 Ah (Battery and Charger Included) in the String Trimmers department at Lowes.com
20V Cordless String Trimmer – Tool Only
Amazon.com : Weed Wacker Cordless Electric Weed Eater Battery Powered, Lightweight Grass Trimmer/Lawn Edger/Mower/Brush Cutter with 2Pcs 21V/2.0Ah Battery Operated, Push Wheeled No String Trimmer for Garden & Yard : Patio, Lawn