ONE+ 18V Cordless String Trimmer/Edger and Blower/Sweeper Combo Kit with 2.0 Ah Battery and
Sun Joe 24-volt 14-in Straight Battery String Trimmer with Edger Conversion Capable 4 Ah (Battery and Charger Included) in the String Trimmers department at Lowes.com
RYOBI 18V String Trimmer Edger 13 in Cutting Width Auto Feed Line Head Tool ONLY | eBay
Amazon.com : Ryobi One ONE+ 18-Volt Lithium-Ion String Trimmer/Edger and Blower Combo Kit 2.0 Ah Battery and Charger Included : Patio, Lawn & Garden