RYOBI's 18V Cordless String Trimmer is $59, more in today's Green Deals - Electrek
RYOBI 40V HP Brushless 15 in. Cordless Carbon Fiber Shaft Attachment Capable String Trimmer with 4.0 Ah Battery and Charger-RY40290VNM - The Home Depot
Ryobi OLT1832 ONE+ Cordless Grass Trimmer 18V Bare Unit 5133