Have a Cordless Tool Battery Won't Recharge? You Can Fix That.
Ryobi P118 18V Dual Chemistry Lithium Ion / NiCad Battery Charger with 2 Genuine OEM P102 Compact Lithium Ion Batteries (Includes 1 x Charger and 2 x Batteries) - Amazon.com
Ryobi OEM 140173019 Charger - Amazon.com
Royobi 18VDC battery charger repair (does not turn on / no lights) - YouTube
How I Fix RYOBI 18v Lithium Battery Thats Not Charging Or Working P102 103 104 105 107 108 109 190 - YouTube
18V ONE+ 150-WATT BATTERY POWER SOURCE AND... - RYOBI Tools