While you wait for answers, we may have found some information which could help you.
Click here for 18 Volt DrillKC1882F Black and Decker drill: what polarity are the battery connections?
how to get a drill bit out of a keyless chuck?
how do I remove the chuck head ?
Repair Cordless Drill Battery?
electric drill stuck chuck?
12v black decker a9275 replacement charger and battery?