12V 60A car battery , maybe dead?

[overunitt]

@ Groundloop

I'm guessing to transform the basic trifilar coil (one trigger- one  power - one inductive power collector charger)  in a (one trigger- two power ) coil.  So two bifilar power strands with a transistor each connected in parallel for more amps out.
What should be the correct circuit because I'm a novice in electronics ?
Thanks !

[tonyben25]

I just want to find what type of batteries could be desulphated. I have tried to desulphating some sealed lead acid battery and cacium lead  battery with little success. I dont know if it is the quality of the batteries that is the issue or the circuit is not good at reviving sealed batteries. I will like to know what other people experience has been.

[SeaMonkey]

With the sealed lead acid batteries it is a bit more difficult.
Quite often they've lost nearly all of their water due to
overcharging and in order to begin the rejuvenation process
distilled water must be added to each cell.

I've just begun rejuvenating two 12 Volt 8 Ampere Hour sealed
batteries which were dry.  I was able to pop the top covers off to
expose the valves/filler vent holes and then added about 80 cc
of distilled water/Magnesium Sulfate solution to each cell.

With electrolyte now in the cells the desulfation process started
very slowly for about three days of steady pulsing until the
sulfation started to break down - then the recovery process
accelerated quickly and the pulsing current increased
substantially as the battery voltage decreased from more than
20 Volts to about 10 Volts.

The batteries have thus far recovered about 1/3 of their capacity
which is a good start but they still need additional pulsing to
complete the desulfation.  I've been working on them now for
nearly two weeks.  Sometimes it is a slow process.

[tonyben25]

Hello Seamonkey,

Thanks for the info. But i will like to ask why you added magnesium sulphate solution.  will only distill water not do?

[MarkE]

With the sealed lead acid batteries it is a bit more difficult.
Quite often they've lost nearly all of their water due to
overcharging and in order to begin the rejuvenation process
distilled water must be added to each cell.

I've just begun rejuvenating two 12 Volt 8 Ampere Hour sealed
batteries which were dry.  I was able to pop the top covers off to
expose the valves/filler vent holes and then added about 80 cc
of distilled water/Magnesium Sulfate solution to each cell.

With electrolyte now in the cells the desulfation process started
very slowly for about three days of steady pulsing until the
sulfation started to break down - then the recovery process
accelerated quickly and the pulsing current increased
substantially as the battery voltage decreased from more than
20 Volts to about 10 Volts.

The batteries have thus far recovered about 1/3 of their capacity
which is a good start but they still need additional pulsing to
complete the desulfation.  I've been working on them now for
nearly two weeks.  Sometimes it is a slow process.

The one thing to watch out for is if too much lead has fallen from the plates and built-up at the bottom of any of the cells, then it can short out that cell.  At a convenient point between cycles you might tip the battery up at a low angle: say 5 to 10 degrees and let it set and check the terminal voltage from time to time.  If it drops by about one cell's worth, then the desulfation will only help for a short time as you are on the verge of permanent battery death.