If you were Registered and logged in, you could reply and use other advanced thread options
|
Posted by Dan_Musicant on April 22, 2007, 11:44 am
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. :)
|
 
| |
Posted by Red on April 22, 2007, 1:37 pm
>
> 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. :)
There is. Solder a short pair of leads with alligator clips to a 12v
light bulb and clip it across the battery leads. Use a smaller bulb,
like a dome light, parking light, or tail light.
Red
|
|
Posted by Dan_Musicant on April 22, 2007, 2:48 pm
:
:>
:> 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. :)
:
:There is. Solder a short pair of leads with alligator clips to a 12v
:light bulb and clip it across the battery leads. Use a smaller bulb,
:like a dome light, parking light, or tail light.
:
:Red
:
:
Hey, that's a smart idea. It would need to be a DC lamp, I suppose, and
most auto lights would probably work, I'd think. Thanks.
|
|
Posted by Jim Yanik on April 23, 2007, 11:10 am
>
>:
>:>
>:> 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. :)
>:
>:There is. Solder a short pair of leads with alligator clips to a 12v
>:light bulb and clip it across the battery leads. Use a smaller bulb,
>:like a dome light, parking light, or tail light.
>:
>:Red
>:
>:
> Hey, that's a smart idea. It would need to be a DC lamp, I suppose,
> and most auto lights would probably work, I'd think. Thanks.
>
Incandescent lamps don't care whether it's DC or AC applied to them.
I have a 12W,12V auto bulb that's used in a Tensor hi-intensity lamp that
applies AC volts to it,works just the same.
--
Jim Yanik
jyanik
at
kua.net
|
|
Posted by JB on April 23, 2007, 11:26 am
>
>
>
>
>
>
> >:
> >:>
> >:> 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. :)
> >:
> >:There is. Solder a short pair of leads with alligator clips to a 12v
> >:light bulb and clip it across the battery leads. Use a smaller bulb,
> >:like a dome light, parking light, or tail light.
> >:
> >:Red
> >:
> >:
> > Hey, that's a smart idea. It would need to be a DC lamp, I suppose,
> > and most auto lights would probably work, I'd think. Thanks.
>
> Incandescent lamps don't care whether it's DC or AC applied to them.
> I have a 12W,12V auto bulb that's used in a Tensor hi-intensity lamp that
> applies AC volts to it,works just the same.
>
> --
> Jim Yanik
> jyanik
> at
> kua.net- Hide quoted text -
>
> - Show quoted text -
I used to build and fly R/C airplanes. Conditioning NiCad batteries
is a big deal to these hobbyists since a dead battery in mid-flight
usually results in a mashed pile of balsa wood and about $500 down the
drain. Search some of the newsgroups or hobby websites for info and
good tips on theory and practice of cycling batteries.
--Jeff
|
Page 2 of 7 < 1 2 3 > last >>
| Similar Threads | Posted | | Re: Any value to dead "cordless" batteries?! | June 13, 2005, 8:16 am |
| Re: Any value to dead "cordless" batteries?! | June 13, 2005, 11:52 am |
| Re: Any value to dead "cordless" batteries?! | June 13, 2005, 2:32 pm |
| Charging Cordless Batteries in a Car | June 9, 2007, 8:16 am |
| Has anyone repaired cordless tool batteries | March 5, 2006, 4:54 am |
| sears cordless tool batteries | November 3, 2007, 9:02 am |
| Re: self-made charger for cordless drill batteries | December 30, 2005, 3:09 pm |
| Cordless power tool batteries deteroriate with time? | February 19, 2007, 8:14 pm |
| Speaking of cordless drill batteries - Milwaukee recall | October 23, 2007, 10:48 am |
| Batteries | March 16, 2007, 1:29 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap