hello mael,
you might want to try something else as a desulfator
ive made several of the smaller ones for lawn mower batteries and small car batteries but it just takes to long to do any good or i built them totally wrong....lol
ive been using a newman motor replica for desulfating my batts
the backspike it produces is hard to nail down because it happens so quickly but i estimate it to be between 150 and 300 volts, and since i dont have an o scope no way for me to be sure. at least my milti-meters give me an idea.
but using the motor and my special mix of chemicals i have given my golf cart a whole new life!!!
before i took an intrest in renewing batteries my cart would only last about 15 min just enuf to get me to my mail box and back.
now it lasts for aprox 4 hours depending on what im doing with it, and it keeps getting better! it seems the more i use it the better it holds a charge!
the neat thing is that the batts in the cart were made in 1999!!
now i diddnt start with the cart batts, i needed to see if it would destroy a normal batt.
so i found a batt in the back of a friends car and asked if i could take it, he said sure its no good!, i couldnt see how since it was still wraped in its origional packing. the date code on the tag was from may of 02 and by the looks of it, it was still "new".
so i took it back to the shop and put it on a trickle charge for about 2 days
by the way its voltage before i put it on charge was 6.2!
after i took it off charge and let it settle its voltage was 12.6, not great but not bad, its sg was low 1100 so it was no good at all.
so instead of trying to put it to use in a car i decided to use it with my other projects, one of them being the newman motor.
after i noticed the high voltage spike from the motor i decided to test the sg again and it seemed slightly higher
, thats when i started reading about chemical and electrical desulfating.
long story short, that first test batt is now in my one ton truck for a long term test and so far so good, it doesnt quite have the cca for the truck but it will still start it when its 10 below!
sorry about the rambling, matt