Ryobi One P505 18V Lithium Ion Cordless 5 1/2" 4,700 RPM Circular Saw (Battery Not Included, Power Tool Only), Green - Amazon.com
RYOBI ONE+ 18V Cordless 5.5 in. Circular Saw (Tool Only) P505B - The Home Depot
RYOBI ONE+ 18V Lithium-Ion 4.0 Ah Compact Battery (2-Pack) and Charger Kit with FREE Cordless ONE+ 5-1/2 in. Circular Saw PSK006-PCL500B - The Home Depot