While you wait for answers, we may have found some information which could help you.
Click here for Drill Battery Faulty
how do i remove a bit from stuck keyed chuck?
how do I remove the chuck head ?
Black & Decker 12V battery pack fails to charge?
B & D hammerdril stopped working ?
how can I fix my black & decker kr600cre drill?
Repair Cordless Drill Battery?