RYOBI RCT4-120G 4V Cordless Cutting Tool (1 x 2.0Ah), Hyper Green - Amazon.com
RYOBI ONE+ 18V Lithium-Ion 4.0 Ah Battery (2-Pack) PBP2005 - The Home Depot
Ryobi R18CK4E-242S Cordless set 18 Volt 2.0/4.0 Ah Li-ion 5133004757
Ryobi P197 Battery ONE + (PLUS) Compatible Replaces P108 Rechargeable Lithium Ion 18 v Volt 4.0 Ah / 72 Wh UL Listed Faster Recharge Single Battery with Fuel Gage - Amazon.com