Ryobi P117 One+ 18 Volt Dual Chemistry IntelliPort Lithium Ion and NiCad Battery Charger (Battery Not Included, Charger Only) - Power Drill Accessories - Amazon.com
How to Charge Ryobi One+ Batteries- What do the Lights Mean? - YouTube
Ryobi ONE+ 18V Battery charger RC18120 | DIY at B&Q