# Battery desulfator

K

#### Ken G.

Jan 1, 1970
0
I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start devices used to start cars and of coarse other used batterys .

I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .

What can anyone say about these .

D

#### Dave Plowman (News)

Jan 1, 1970
0
I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start devices used to start cars and of coarse other used batterys .
I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .
What can anyone say about these .

Try trickling about 50 volts at a max of 100mA through the battery for a
few days.

J

#### Jim Yanik

Jan 1, 1970
0
[email protected] (Ken G.) wrote in 3235.bay.webtv.net:
I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start devices used to start cars and of coarse other used batterys .

I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .

What can anyone say about these .

Vector makes battery charger/maintainers that desulfate batteries.

N

#### N Cook

Jan 1, 1970
0
Ken G. said:
I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start devices used to start cars and of coarse other used batterys .

I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .

What can anyone say about these .

So how is it supposed to work?
I like to have a car battery around to blast dendrited ni-cads but they
usually end up sulphated sitting around too much.

D

#### Dave Plowman (News)

Jan 1, 1970
0
So how is it supposed to work?
I like to have a car battery around to blast dendrited ni-cads but they
usually end up sulphated sitting around too much.

In theory you can reverse the process by reversing what caused it. So a
slow charge for a very long period *might* work. Trouble is most modern
chargers don't allow a high enough voltage to produce meaningful current
through the battery so you need a bench supply or purpose made job. Or an
ancient totally unregulated type where the off load voltage is high.

FWIW it's only worked once for me where a relatively new battery was
knackered through leaving the car lights on for three weeks. ;-) A jump
start got the car going, but the battery was still totally flat after the
30 mile journey back from the airport. It took a week of high voltage
before it would take any real current and start charging. It lasted for a
few years after that.

C

Jan 1, 1970
0
J

#### Jim Yanik

Jan 1, 1970
0
N Cook said:
So how is it supposed to work?
I like to have a car battery around to blast dendrited ni-cads but they
usually end up sulphated sitting around too much.

If you Google "desulfator" you will find circuits that can be built very
inexpensively.You will also find references to how they work.

J

#### Jim Yanik

Jan 1, 1970
0
Ken.. I have a circuit for this filed. Will look for it and send to
you if

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A POX on the twits who post gif or other binaries along with their replies
to threads on this NON-binary newsgroup.

that would be YOU,Warren Weber. KNOCK IT OFF,CEASE,DESIST.

K

#### Ken G.

Jan 1, 1970
0
I read that website for a long time and got very confused at all the
different stuff there .
wall .

S

#### Sam Goldwasser

Jan 1, 1970
0
I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start devices used to start cars and of coarse other used batterys .
I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .

What can anyone say about these .

But do these really work?

I can only recall 1 or 2 replies with actual success stories, and at least 1 of
those could have been a situation where the battery was caught just in time
so that there was minimal sulfation.

If I have a battery that's been sitting around discharged for a year, will
anything help?

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

N

#### N Cook

Jan 1, 1970
0
Sam Goldwasser said:
But do these really work?

I can only recall 1 or 2 replies with actual success stories, and at least 1 of
those could have been a situation where the battery was caught just in time
so that there was minimal sulfation.

If I have a battery that's been sitting around discharged for a year, will
anything help?

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

Exactly the same interest, if there is a viable answer. As far as i was
aware nothing could remove the layer of insulating and insoluble lead
(bi)sulpha(i)t(d)e? film other than mechanically scraping the plates

K

#### Ken Weitzel

Jan 1, 1970
0
Sam said:
But do these really work?

I can only recall 1 or 2 replies with actual success stories, and at least 1 of
those could have been a situation where the battery was caught just in time
so that there was minimal sulfation.

If I have a battery that's been sitting around discharged for a year, will
anything help?

Hi...

I have no idea whether or not what I experienced was "sulphate" or not;
but for what little it may be worth...

Left a garden tractor with a snow blower attached and an almost new
battery installed sit for two or three years untouched.

When I finally got back to it it was dead, not a click.

Found one of the battery posts (pos, I think) evenly and completely
covered in a flat black "something". Looked like it had been painted.

One of those round battery post wire brushes wouldn't even scratch it.

Using a course file and tons of elbow grease removed it. Then a long
charge at 10 amps or so gave me a few starts - but for practical
purposes the battery was garbage.

IF that black stuff was indeed sulphate, I can't see anything touching
it.

Take care.

Ken

C

#### Captain Midnight

Jan 1, 1970
0
Sam Goldwasser said:
But do these really work?

I can only recall 1 or 2 replies with actual success stories, and at least 1 of
those could have been a situation where the battery was caught just in time
so that there was minimal sulfation.

If I have a battery that's been sitting around discharged for a year, will
anything help?

Back when the only thing I knew about chargers/batteries was polarity had to
be observed I bought a cheap 1 amp trickle charger cause it was all I could
afford. IIRC it put out 18volts under light/no load. I "brought back" a
couple of batteries with it by leaving it on for a couple of days. I got
several more months of use from the batteries in warm weather but they still
didn't have enough capacity for cold starting and had to be replaced then.

I've never really looked at the units in question but my experience says
theirs probably some merit to them. Question is, do you want to put that
kind of money into something that's going to give batteries of suspect
usefulness. I have batteries because I want to use them when needed, not
screw around with them. I think most people would be better off buying
quality batteries and learning to take care of them. Lead acid batteries
self-discharge ~1%/day. I'd never mess with a battery that had gone below
10.5volts.

I have a MC with a 9 year old battery in it. Manually charged it in the off
season the first 5 years and have been using a Battery Tender the last 4.
The BT makes the chore much easier. IMHO it makes a lot more sense to keep a
battery healthy than to resurrect a dead one. YMMV

J

#### jonpi

Jan 1, 1970
0
i once tried using baking soda to "clean" the plates...emptied
electrolyte, used baking soda, rinsed alot, refilled with
electrolyte...it didn't really work...it was a motorcycle battery...i was 15

i now think of the plates as more high tech, only the amount of lead
necessary...not like they are solid lead that the surface can be
cleaned...imho

H

#### Homer J Simpson

Jan 1, 1970
0
Found one of the battery posts (pos, I think) evenly and completely
covered in a flat black "something". Looked like it had been painted.

Some guys spray paint them to prevent corrosion. Others use grease or felt
washers soaked in grease.

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J

#### JANA

Jan 1, 1970
0
I know of few people who used a desulfator. It did the job, but only for a
short while. We think the plates inside the batteries took on some permanent
damage.

In the end, when we calculated the loss of time, the cost of the device to
do the desulfacation, and considering the potential unreliability of the
batteries, we came to the conclusion, it is better to buy new batteries,
maintain them, and they should last at least 3 to 5 years.

--

JANA
_____

I am looking into getting one of these to try to save several batterys
that are new but were stored to long without a charge such as the jump
start` devices used to start cars and of coarse other used batterys .

I have been searching on the net for one that simply plugs into 120
volts for use inside . Most of them i see hook to 12 volts and stay in a
vehicle . Some 120 volt ones cost 500$. I am looking for one around 100$ .

What can anyone say about these .

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