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Give it a try; cannot hurt.On 7/30/2014 10:37 PM, Robert Baer wrote:
Shaun wrote:
"Jan Panteltje" wrote in message news:lr3fno$e37$1@news.datemas.de...
Been trying to 'desulfinate' a 13Ah lead acid battery now for a few
weeks.
The method I used is to run 200 mA at 16V into a 12V battery.
The battery had only 1/10 of capacity,
now it has 1/8.
Takes too long for my liking, would several month that way.
So did some googling, and found this circuit diagram only:
http://images.yuku.com.s3.amazonaws.com/image/pjpeg/f1116c552716baf0a54f0050308e5d20c651ef3c.pjpg
Basically a flyback where the flyback impulse goes into the battery.
You can buy that sort of stuff on ebay too (30$ ex shipping):
http://www.ebay.com/itm/Top-Selling-12V-8A-Negative-Pulse-Desulfation-car-battery-charger-/171399004719?pt=Battery_Chargers&hash=item27e82d422f
But I thought why bother, I have such a flyback powering some HV (for a
helium neon laser).
So I took a diode from the collector and put that back into my battery.
Been running now a few hours, about few hundred mA average...
nice pulse, 15 kHz repetition, will leave it on some time
Anybody any experience bringing old sulfated lead acid batteries back
alive?
Circuits?
For the amount of time and expense and effort, just buy a new car
battery or gel cell. If the battery is 4 + years old, it's no longer
going to retain capacity.
Shaun
Excuse me, but i described a simple circuit that works.
Used the scheme on a Willard motorcycle battery that was made "dry
charged" and was about 15 years old before acid was put in it.
It took about 150VAC to get a few milliamps thru it at first.
Got it fully recovered; short circuit current was in excess of 200 amps.
OK, but how has the technique worked on a cell that's been wet and
discharged for 15 years?
Ok, so you took a NOS dry charged battery, put in the juice.mike wrote:
On 7/30/2014 10:37 PM, Robert Baer wrote:
Shaun wrote:
"Jan Panteltje" wrote in message news:lr3fno$e37$1@news.datemas.de...
Been trying to 'desulfinate' a 13Ah lead acid battery now for a few
weeks.
The method I used is to run 200 mA at 16V into a 12V battery.
The battery had only 1/10 of capacity,
now it has 1/8.
Takes too long for my liking, would several month that way.
So did some googling, and found this circuit diagram only:
http://images.yuku.com.s3.amazonaws.com/image/pjpeg/f1116c552716baf0a54f0050308e5d20c651ef3c.pjpg
Basically a flyback where the flyback impulse goes into the battery.
You can buy that sort of stuff on ebay too (30$ ex shipping):
http://www.ebay.com/itm/Top-Selling-12V-8A-Negative-Pulse-Desulfation-car-battery-charger-/171399004719?pt=Battery_Chargers&hash=item27e82d422f
But I thought why bother, I have such a flyback powering some HV (for a
helium neon laser).
So I took a diode from the collector and put that back into my battery.
Been running now a few hours, about few hundred mA average...
nice pulse, 15 kHz repetition, will leave it on some time
Anybody any experience bringing old sulfated lead acid batteries back
alive?
Circuits?
For the amount of time and expense and effort, just buy a new car
battery or gel cell. If the battery is 4 + years old, it's no longer
going to retain capacity.
Shaun
Excuse me, but i described a simple circuit that works.
Used the scheme on a Willard motorcycle battery that was made "dry
charged" and was about 15 years old before acid was put in it.
It took about 150VAC to get a few milliamps thru it at first.
Got it fully recovered; short circuit current was in excess of 200 amps.
OK, but how has the technique worked on a cell that's been wet and
discharged for 15 years?
Give it a try; cannot hurt.
Oh! Forgot..you have to wait 15 years to get the battery to that spec...
Sorry,that battery was sulphated all to hell; did i not say that itOn 7/31/2014 11:59 AM, Robert Baer wrote:
mike wrote:
On 7/30/2014 10:37 PM, Robert Baer wrote:
Shaun wrote:
"Jan Panteltje" wrote in message news:lr3fno$e37$1@news.datemas.de...
Been trying to 'desulfinate' a 13Ah lead acid battery now for a few
weeks.
The method I used is to run 200 mA at 16V into a 12V battery.
The battery had only 1/10 of capacity,
now it has 1/8.
Takes too long for my liking, would several month that way.
So did some googling, and found this circuit diagram only:
http://images.yuku.com.s3.amazonaws.com/image/pjpeg/f1116c552716baf0a54f0050308e5d20c651ef3c.pjpg
Basically a flyback where the flyback impulse goes into the battery.
You can buy that sort of stuff on ebay too (30$ ex shipping):
http://www.ebay.com/itm/Top-Selling-12V-8A-Negative-Pulse-Desulfation-car-battery-charger-/171399004719?pt=Battery_Chargers&hash=item27e82d422f
But I thought why bother, I have such a flyback powering some HV
(for a
helium neon laser).
So I took a diode from the collector and put that back into my
battery.
Been running now a few hours, about few hundred mA average...
nice pulse, 15 kHz repetition, will leave it on some time
Anybody any experience bringing old sulfated lead acid batteries back
alive?
Circuits?
For the amount of time and expense and effort, just buy a new car
battery or gel cell. If the battery is 4 + years old, it's no longer
going to retain capacity.
Shaun
Excuse me, but i described a simple circuit that works.
Used the scheme on a Willard motorcycle battery that was made "dry
charged" and was about 15 years old before acid was put in it.
It took about 150VAC to get a few milliamps thru it at first.
Got it fully recovered; short circuit current was in excess of 200
amps.
OK, but how has the technique worked on a cell that's been wet and
discharged for 15 years?
Give it a try; cannot hurt.
Oh! Forgot..you have to wait 15 years to get the battery to that spec...
Ok, so you took a NOS dry charged battery, put in the juice.
Charged it and it worked to full capacity.
That IS what dry charged is designed to do.
I claim that's unrelated to the current thread.
Well, you did say it passed only a few milliamps.mike wrote:
On 7/31/2014 11:59 AM, Robert Baer wrote:
mike wrote:
On 7/30/2014 10:37 PM, Robert Baer wrote:
Shaun wrote:
"Jan Panteltje" wrote in message news:lr3fno$e37$1@news.datemas.de...
Been trying to 'desulfinate' a 13Ah lead acid battery now for a few
weeks.
The method I used is to run 200 mA at 16V into a 12V battery.
The battery had only 1/10 of capacity,
now it has 1/8.
Takes too long for my liking, would several month that way.
So did some googling, and found this circuit diagram only:
http://images.yuku.com.s3.amazonaws.com/image/pjpeg/f1116c552716baf0a54f0050308e5d20c651ef3c.pjpg
Basically a flyback where the flyback impulse goes into the battery.
You can buy that sort of stuff on ebay too (30$ ex shipping):
http://www.ebay.com/itm/Top-Selling-12V-8A-Negative-Pulse-Desulfation-car-battery-charger-/171399004719?pt=Battery_Chargers&hash=item27e82d422f
But I thought why bother, I have such a flyback powering some HV
(for a
helium neon laser).
So I took a diode from the collector and put that back into my
battery.
Been running now a few hours, about few hundred mA average...
nice pulse, 15 kHz repetition, will leave it on some time
Anybody any experience bringing old sulfated lead acid batteries back
alive?
Circuits?
For the amount of time and expense and effort, just buy a new car
battery or gel cell. If the battery is 4 + years old, it's no longer
going to retain capacity.
Shaun
Excuse me, but i described a simple circuit that works.
Used the scheme on a Willard motorcycle battery that was made "dry
charged" and was about 15 years old before acid was put in it.
It took about 150VAC to get a few milliamps thru it at first.
Got it fully recovered; short circuit current was in excess of 200
amps.
OK, but how has the technique worked on a cell that's been wet and
discharged for 15 years?
Give it a try; cannot hurt.
Oh! Forgot..you have to wait 15 years to get the battery to that spec...
Ok, so you took a NOS dry charged battery, put in the juice.
Charged it and it worked to full capacity.
That IS what dry charged is designed to do.
I claim that's unrelated to the current thread.
Sorry,that battery was sulphated all to hell; did i not say that it
passed only a few MILLIamps at 150 volts?
Beats me; there is always moisture even in a "sealed" system.On 8/1/2014 9:36 AM, Robert Baer wrote:
mike wrote:
On 7/31/2014 11:59 AM, Robert Baer wrote:
mike wrote:
On 7/30/2014 10:37 PM, Robert Baer wrote:
Shaun wrote:
"Jan Panteltje" wrote in message
news:lr3fno$e37$1@news.datemas.de...
Been trying to 'desulfinate' a 13Ah lead acid battery now for a few
weeks.
The method I used is to run 200 mA at 16V into a 12V battery.
The battery had only 1/10 of capacity,
now it has 1/8.
Takes too long for my liking, would several month that way.
So did some googling, and found this circuit diagram only:
http://images.yuku.com.s3.amazonaws.com/image/pjpeg/f1116c552716baf0a54f0050308e5d20c651ef3c.pjpg
Basically a flyback where the flyback impulse goes into the battery.
You can buy that sort of stuff on ebay too (30$ ex shipping):
http://www.ebay.com/itm/Top-Selling-12V-8A-Negative-Pulse-Desulfation-car-battery-charger-/171399004719?pt=Battery_Chargers&hash=item27e82d422f
But I thought why bother, I have such a flyback powering some HV
(for a
helium neon laser).
So I took a diode from the collector and put that back into my
battery.
Been running now a few hours, about few hundred mA average...
nice pulse, 15 kHz repetition, will leave it on some time
Anybody any experience bringing old sulfated lead acid batteries
back
alive?
Circuits?
For the amount of time and expense and effort, just buy a new car
battery or gel cell. If the battery is 4 + years old, it's no longer
going to retain capacity.
Shaun
Excuse me, but i described a simple circuit that works.
Used the scheme on a Willard motorcycle battery that was made "dry
charged" and was about 15 years old before acid was put in it.
It took about 150VAC to get a few milliamps thru it at first.
Got it fully recovered; short circuit current was in excess of 200
amps.
OK, but how has the technique worked on a cell that's been wet and
discharged for 15 years?
Give it a try; cannot hurt.
Oh! Forgot..you have to wait 15 years to get the battery to that
spec...
Ok, so you took a NOS dry charged battery, put in the juice.
Charged it and it worked to full capacity.
That IS what dry charged is designed to do.
I claim that's unrelated to the current thread.
Sorry,that battery was sulphated all to hell; did i not say that it
passed only a few MILLIamps at 150 volts?
Well, you did say it passed only a few milliamps.
While that is a symptom of sulphation, I'm not sure that supports your
conclusion that sulphation was the actual cause and your technique
cured sulphation.
I like to learn new things...
Maybe you could describe the chemistry whereby a sealed dry charged
battery gets sulphated?