"Mike Berger" wrote in message
...
The same company owns Black & Decker and DeWalt, but it doesn't
mean the product lines are identical. I use my DeWalt 18 v.
driver and trimsaw regularly, and the original battery packs
are still at about 95% capacity after six years.

I use them until they are discharged, and then I recharge them.

Maybe you are less careful with your battery packs, and
that's why you have problems.

If the equipment is properly designed, it is only necessary to completely
run the batteries down to refresh them a few times a year.

Running the battery down *every* time under load leads to cells being
reverse charged and results in irrecoverable S/C cells!