That is pretty typical. The silliest thing you can do is to put all sort of sulfates into batteries in the hope of solving a problem. Urban legends will never pass away. Pencil lead can contain some unusual compounds in addition to carbon (recondition dead battery). There are lots of carbon powder manufacturers. Car tires have to do with 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 thrown away as NiCd is broken- simply cut around top crimp with hacksaw, decipher s/s case with cutter, withdraw contents- outer foil is cadmium, inner foil is nickel, & some strong electrolyte & seperator- all injury in spiral pattern.
To acquire Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release hazardous fumes- do outside -do not breathe vapours!!! When cadmium is completely dissolved( & sometimes the electrolyte cadmium mix is a lovely green, depending upon quality of cadmium from cell maker!)- task done! Got ta state- the mix I have contributed to batt cells does not appear to help! In reality- I got ta state the ONLY thing I used that worked was INOX MX2( in 1 batt so far- I will get some more MX2 &try; & try; in other batts to confirm yes or no! Apart from that, the other thing is that the batt itself should be just gently sulfated).
Still it is proficient at identifying o/c cell/s in batt- pulses go up higher with degree of o/c! have actually seen 1250 volts! Cut open, & broke down pos grid! in 1 cell-others almost so!. how do you recondition a dead car battery. Bevan - I would suggest refining the cadmium by making the cadmium you recovered from the NiCds the positive in an electroplating cell.
Use a tin wire or solder wire unfavorable. Source of power can be 12V battery. Place 220 ohm series resistor. The cadmium that gets plated onto the unfavorable 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 creative! Why didn't I think of that prior to? I will attempt it. John - You're one wise gentleman, thanks for the information. Bevan - I believe I might have at long last managed to find out what cadmium sulfate does. It definitely electroplates out onto the unfavorable grid metal when the battery is intentionally pressed into regulated overcharge.
This helps the lead sulfate nearest the grids to become active again and to be converted into lead and sulfate ions. Repeated charging, releasing spreads the conductive environment gradually and progressively into the bulk of the lead sulfate. The process seems to have a limit. how to recondition a 12v battery. It would appear the secret to attaining 100% desulfation is to figure out how to get conduction to spread into 100% of the sulfate.
Including progressively more just creates dendrites and causes shorts. The descriptions provided by desulation merchants that insoluble sulfation inevitably coats the plates when batteries are used and that their treatment strips it away is pure fantasy. The sulfate stays right where it is. It is converted. While both positive and negative plates can become sulfated, the favorable sulfation just 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, wouldn't just copper suffices? Afdhal- it is just John's theory- however i would say 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 a lot of! Afdhal - No, copper and copper sulfate are not suitable.
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 avoids electroplating when a battery is standing. It is only when a battery is put on gassing charge that the voltage at the negative plate prefers electroplating.
Copper has an electrochemical prospective Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will just 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, salt, etc. 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. Built lead-acid cells in glass jars. I observed and measured (what is battery reconditioning). John- to my knowledge, 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 REALITY- 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 individuals believe about sulfation. I ran an experiment developed to answer yes or no, whether batteries can be desulfated. My experiment revealed that a person might get a quarter to a 3rd short-term recovery. I would not describe that as a "yes".
Others can easily repeat my expermiment. Human nature being what it is, some individuals so do not like an ugly reality getting in the way of a stunning story, their counter arguments will always remain in words, not deeds. The litmus test: Desulfation remains a struggling industry. Something is wrong. There is no conspiracy.
If you want batteries to last longer, work on them, help them while they are still functional, do not fuss over them after they "signed off". We don't feed medicine to dead people. Why do it to batteries? The experiment is described on "CAN BATTERIES BE RESTORED". Well, anybody can state what they want about sulfation or desulfation, but including Epsom salt (option= 8 teaspoonfuls Epsom salts liquified in 1 pint distilled water) coupled with a 3 day trickle charge assisted my truck battery keep a much better charge.
The battery performed well through the winter after my treatment and is still going strong! I don't understand how much longer it will live, however I will let you know when it finally dies. Adios Shadmin - The portion of the 1 pint of water that you managed to put into the battery assisted; the 3 days extra drip charge assisted; the Epsom salts pleased your belief - how to recondition any battery.
ALL the so-called remedies incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! But generally hurt!! What many posters like to believe is that THEIR!!! treatment made a distinction!! BUT ignore all the other criteria of battery reaction incl temp, humidity etc in their effort to make sense of a complex subject!! (reconditioning car battery). The bare reality is that all vehicle charge systems do not fully charge the l/a starter batt- however only around 14v- for several different reasons.
Bevan - Where does the acid that raised your SG originated from? John- simply got back on line after week after altering ISP!!! The increased sg is due to the dollop in the 15 ml added of Inox Mx2 to each cell! IT definitely is NOT due to reducing sulfation & therefore raising sg!. recondition 12 volt battery.