Amazon.com Customer Reviews
Probably more of a charger problem than a battery problem - Review written on December 25, 2006
Rating: 2 out of 5
I have 3 18 volt Ni-cad batteries, 2 of which suddenly would no longer accept a charge. I tried the 9 volt battery trick, didn't work. I then took a 12 volt DC power supply and some alligator clip test leads and hooked up the batteries to this setup for about an hour, this did work, now they would accept a charge. You could do the same thing by substituting your car battery in place of a power supply.
I still had a problem with the batteries not holding a strong charge, but by running the battery down by holding the drill chuck by hand, waiting for the battery to cool, and then recharging the battery, I think I have cured them.
It seems that the problem is a.)the lack of a conditioning cycle on the original charger, and b.)the 18 volt batteries being more susceptible to charging issues that a conditioning cycle would cure.
The new Milwaukee charger for the Li-ion batteries has a conditioning cycle for Ni-cads which could be a easy solution to this problem.
I give this product 2 stars because of Milwaukee's failure to man up and address the problem.