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 ONE+ Line Trimmer Assembly & Use - YouTube
Amazon.com: Ryobi P2300A ONE+ 9 in. 18-Volt Lithium-Ion Cordless Edger - Battery and Charger Not Included
18V ONE+ 9" EDGER KIT - RYOBI Tools
RYOBI ONE+ 18V 9 in. Cordless Battery Edger (Tool Only) P2300BTL - The Home Depot