Replaced Black and Decker "Single Source" 18V battery with HarborFreight, but charging not stopping

Batteries and Chargers Rechargeable Batteries
21

Sorry, I must have missed it. Turnigy Accucell 6, Accucell 8, or Accucell 8150…?
The 8150 can discharge 150 watts.

22

Agreed. I gutted all my 18V single source Ni-Cd cells and converted them with an adapter to take ryobi 18V li-ion packs. Best thing I ever did.