Ryobi Battery Repair - Battery is not charging, how to fix [Quick Version] - YouTube
How to fix Ryobi 40V battery problems | Ryobi 40V Cordless tools are great, but they have some common problems that pop up for many users. See more detail about these fixes
RYOBI ONE+ 18V Lithium-Ion 4.0 Ah Battery (2-Pack) and Charger Kit PSK006 - The Home Depot
18V ONE+ 4AH LITHIUM HIGH PERFORMANCE BATTERY... - RYOBI Tools
Have a Cordless Tool Battery Won't Recharge? You Can Fix That.