That is quite typical. The silliest thing you can do is to put all kinds of sulfates into batteries in the hope of resolving an issue. Urban myth will never ever pass away. Pencil lead can include some unusual substances in addition to carbon (battery reconditioning equipment). There are a lot of carbon powder manufacturers. Car tires are about 50% carbon.
Does not cost an arm and a leg. Afdhal- I get cadmium from utilized NiCd cells-aaa or aa sizes- such as found in solar garden lights- after a few years they are tossed out as NiCd is worn- merely cut around top crimp with hacksaw, unravel s/s case with cutter, withdraw contents- outer foil is cadmium, inner foil is nickel, & some solid electrolyte & seperator- all wound in spiral pattern.
To acquire Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & emit toxic fumes- do outside -do not breathe vapours!!! When cadmium is totally dissolved( & often the electrolyte cadmium mix is a charming green, depending upon quality of cadmium from cell maker!)- job done! Got ta state- the mix I have contributed to batt cells does not seem to help! In fact- I got ta say the ONLY thing I used that worked was INOX MX2( in 1 batt so far- I will get some more MX2 &try; & shot; in other batts to verify yes or no! Apart from that, the other thing is that the batt itself should be just lightly sulfated).
Still it is good at identifying o/c cell/s in batt- pulses go up higher with degree of o/c! have actually seen 1250 volts! Cut open, & disintegrated pos grid! in 1 cell-others almost so!. diy recondition car battery. Bevan - I would suggest improving the cadmium by making the cadmium you recuperated from the NiCds the positive in an electroplating cell.
Utilize a tin wire or solder wire unfavorable. Power source can be 12V battery. Insert 220 ohm series resistor. The cadmium that gets plated onto the negative will be dendritic and pure. The real voltage throughout the electroplating cell will be under 0. battery recondition. 5V. The green you explain would be nickel contamination.
Bevan - That's innovative! Why didn't I think about that before? I will attempt it. John - You're one clever gentleman, thanks for the info. Bevan - I think I may have at long last handled to figure out what cadmium sulfate does. It certainly electroplates out onto the negative grid metal when the battery is intentionally pressed into regulated overcharge.
This assists the lead sulfate nearest the grids to become active once again and to be converted into lead and sulfate ions. Repeated charging, discharging spreads the conductive environment slowly and gradually into the bulk of the lead sulfate. The process seems to have a limit. materials needed to recondition car battery. It would appear the trick to achieving 100% desulfation is to determine how to get conduction to spread into 100% of the sulfate.
Including gradually more simply creates dendrites and triggers shorts. The explanations provided by desulation merchants that insoluble sulfation inevitably coats the plates when batteries are utilized which their treatment strips it away is pure dream. The sulfate remains right where it is. It is transformed. While both favorable and negative plates can become sulfated, the favorable sulfation simply reverses when the battery is charged.
John - If I understand you correctly, did you meant all the cadmium does is electroplating itself on the unfavorable grid?If so, would not just copper is good enough? Afdhal- it is simply John's theory- but i would state cadmium does not just plate itself- requirements driving- so does copper- BUT copper is a non laster in H2SO4! As are most metals! Lead lasts longer than the majority of! Afdhal - No, copper and copper sulfate are not appropriate.
Cadmium has an electrochemical capacity of -0. 4030V. Lead has an electrochemical potential of -0. 1262V. The electrochemical capacity of cadmium is such that it prevents electroplating when a battery is standing. It is only when a battery is placed on gassing charge that the voltage at the negative plate favors electroplating.
Copper has an electrochemical prospective Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will merely plate onto the negatives regardless and remain there, triggering the plates to gas and to self discharge and to sulfate. The electrochemical potentials of aluminum, magnesium, potassium, sodium, and so on are all far to unfavorable, the metals far too reactive in battery acid, for anything of advantage to happen.
Bevan - It is not a theory. I ran the experiments. Constructed lead-acid cells in glass jars. I observed and determined (recondition a battery). John- to my understanding, what you have done is an experiment- then forwarded an hypothesis to what you observed- then you advanced a theory- NOW-as to that theory to become TRUTH- your findings MUST be reproduced by other like minded persons- can't see that occurring right now- still, there is hope.
Bevan - I personally might not care less what people believe about sulfation. I ran an experiment designed to respond to yes or no, whether batteries can be desulfated. My experiment revealed that a person may get a quarter to a 3rd short-term recovery. I would not describe that as a "yes".
Others can quickly repeat my expermiment. Humanity being what it is, some people so dislike an awful fact obstructing of a lovely story, their counter arguments will always remain in words, not deeds. The litmus test: Desulfation stays a struggling industry. Something is wrong. There is no conspiracy.
If you want batteries to last longer, work on them, assist them while they are still serviceable, don't fuss over them after they "signed off". We do not feed medicine to dead individuals. Why do it to batteries? The experiment is described on "CAN BATTERIES BE BROUGHT BACK". Well, anybody can say what they want about sulfation or desulfation, but including Epsom salt (solution= 8 teaspoonfuls Epsom salts dissolved in 1 pint pure water) combined with a 3 day drip charge helped my truck battery keep a much better charge.
The battery performed well through the winter season after my treatment and is still going strong! I do not understand how much longer it will live, however I will let you know when it lastly passes away. Adios Shadmin - The portion of the 1 pint of water that you managed to take into the battery assisted; the three days extra drip charge assisted; the Epsom salts pleased your belief - how to recondition a dead battery.
ALL the so-called remedies incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! But typically hurt!! What many posters like to think is that THEIR!!! treatment made a distinction!! BUT ignore all the other specifications of battery action incl temp, humidity etc in their attempt to understand a complex subject!! (high frequency battery reconditioning). The bare truth is that all vehicle charge systems do not fully charge the l/a starter batt- however only around 14v- for a number of different factors.
Bevan - Where does the acid that raised your SG originated from? John- simply returned on line after week after changing ISP!!! The increased sg is due to the dollop in the 15 ml included of Inox Mx2 to each cell! IT absolutely is NOT due to reducing sulfation & thus raising sg!. what is in battery reconditioning solution.