On Sun, 22 Apr 2007 10:22:22 -0400, in alt.home.repair you wrote:
:> I have a couple of cordless drills I bought a bit over 5 years ago, a
:> Dewalt 9.6v and a Panasonic 12v. They both came with two NiCD batteries
:> and I've been using them lightly and the batteries (it seems to me) are
:> not holding much of a charge.
:> . . . pur the drills on Low and rubber bands around
:> the trigger and let the motors run until I can hear the battery's losing
:> power and then let the battery sit 5-10 minutes (maybe not necessary, it
:> really doesn't seem hot), and then charge. I figure if I do this 4 times
:> or so for each battery, it may well restore most of the capacity. Has
:> anyone tried something like this?
:It was normal for the charge-holding capacity of
:1990s NiCad batteries to dwindle after 5 years or so.
:So why not make this experiment and post results
:here, whether good or bad?
I bought these drills about January 2002.
Yes, I'm doing the experiment right now. I'm recording the amount of
time it takes to discharge and charge each battery during each cycle,
and I figure I'll do 4 cycles with each battery.
I wish there was a way (I'm sure there is) that I could discharge them
without using the motor, but maybe it's not a problem. If I knew how, I
would build a discharge device, but my electronics savvy isn't great.
I'm cross posting this post to sci.chem.electrochem.battery in hopes for
some expert advice. :)