RYOBI ONE+ 18V HIGH PERFORMANCE Lithium-Ion 4.0 Ah Battery and Charger Starter Kit PSK004 - The Home Depot
18V Battery and Charger Combo for Ryobi 18-Volt Cordless Tools Battery and P118B Charger, Cell9102 18V Battery Capacity Output 5.0Ah - Amazon.com
Ryobi P117 One+ 18 Volt Dual Chemistry IntelliPort Lithium Ion and NiCad Battery Charger (Battery Not Included, Charger Only) - Power Drill Accessories - Amazon.com