Fix Fault Black & Decker

I have had a black & decker cordless drill for approx 4 years now doesnt last long before the battery needs to be recharged

how do i put the clutch-torx back together on a black and decker kc123f drill

Hello my 14.4v battery charger doesn't work - I tried charging something else from it & I'm guessing I've blown something. Is it repairable or do I need a but another one (expensive).

charger start out blinking at a steady pace and then after 3-4 mins flashes very fast. Whats the problem and can I save the battery?

Where would I find a reset button on my B & D cordless screwdriver.