While you wait for answers, we may have found some information which could help you.
Click here for Cordless Black DrillRepair Cordless Drill Battery?
how can I fix my black & decker kr600cre drill?
Black & Decker 12V battery pack fails to charge?
how to get a drill bit out of a keyless chuck?
12v black decker a9275 replacement charger and battery?
electric drill stuck chuck?