RYOBI 40V HP Brushless 21 in. Cordless Battery Walk Behind Dual-Blade Self-Propelled Mower with (2) 6.0 Ah Batteries & Charger RY401150US - The Home Depot
Amazon.com: Ryobi OP4040A 40 Volt 4.0 Ah High Capacity Lithium-Ion Battery with On Board Fuel Gauge (Non-Retail Packaging)
RYOBI ONE+ HP 18V Brushless 10 in. Cordless Battery Chainsaw and 110 MPH 350 CFM Leaf Blower with 4.0 Ah Battery and Charger P2520-BLW - The Home Depot
Ryobi 40V Battery and Charger Kit 4.0 Ah Lithium-Ion Battery Set OEM OP4040 + OP404 (Renewed) - - Amazon.com