That is pretty typical. The silliest thing you can do is to put all kinds of sulfates into batteries in the hope of resolving a problem. Urban myth will never ever die. Pencil lead can contain some weird compounds in addition to carbon (reconditioning a battery). There are a lot of carbon powder makers. Cars and truck tyres 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 discovered in solar garden lights- after a couple of years they are tossed out as NiCd is worn out- merely cut around top crimp with hacksaw, decipher s/s case with cutter, withdraw contents- external foil is cadmium, inner foil is nickel, & some solid electrolyte & seperator- all injury in spiral pattern.
To acquire Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release toxic fumes- do outdoors -do not breathe vapours!!! When cadmium is completely liquified( & often the electrolyte cadmium mix is a beautiful green, depending on quality of cadmium from cell maker!)- task done! Got ta state- the mix I have actually included to batt cells does not seem to help! In truth- 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 confirm yes or no! Apart from that, the other thing is that the batt itself must be only gently sulfated).
Still it is proficient at determining o/c cell/s in batt- pulses go up greater with degree of o/c! have actually seen 1250 volts! Cut open, & disintegrated pos grid! in 1 cell-others nearly so!. recondition dead battery. Bevan - I would recommend refining the cadmium by making the cadmium you recuperated from the NiCds the favorable in an electroplating cell.
Use 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 unfavorable will be dendritic and pure. The actual voltage across the electroplating cell will be under 0. how to restore a dead car battery. 5V. The green you explain would be nickel contamination.
Bevan - That's creative! Why didn't I believe of that before? I will attempt it. John - You're one clever gentleman, thanks for the info. Bevan - I think I might have at long last managed to determine what cadmium sulfate does. It absolutely electroplates out onto the unfavorable grid metal when the battery is deliberately pushed into regulated overcharge.
This assists 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 slowly and gradually into the bulk of the lead sulfate. The process seems to have a limitation. how to recondition a battery at home. It would appear the trick to achieving 100% desulfation is to figure out how to get conduction to spread out into 100% of the sulfate.
Adding progressively more merely develops dendrites and triggers shorts. The explanations given by desulation merchants that insoluble sulfation undoubtedly coats the plates when batteries are used and that their treatment strips it away is pure dream. The sulfate remains right where it is. It is converted. While both positive and unfavorable plates can become sulfated, the favorable sulfation just reverses when the battery is charged.
John - If I understand you correctly, did you suggested all the cadmium does is electroplating itself on the negative grid?If so, wouldn't just copper suffices? Afdhal- it is just John's theory- but i would state cadmium does not simply 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 capacity of -0. 1262V. The electrochemical capacity of cadmium is such that it prevents electroplating when a battery is standing. It is just when a battery is put on gassing charge that the voltage at the unfavorable plate prefers electroplating.
Copper has an electrochemical potential Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will simply 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, etc. are all far to unfavorable, the metals far too reactive in battery acid, for anything of benefit to take place.
Bevan - It is not a theory. I ran the experiments. Built lead-acid cells in glass containers. I observed and measured (car 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 duplicated by other like minded individuals- can't see that happening simply yet- still, there is hope.
Bevan - I personally could not care less what people opine about sulfation. I ran an experiment developed to answer yes or no, whether batteries can be desulfated. My experiment showed that one might get a quarter to a third short-term recovery. I would not describe that as a "yes".
Others can quickly repeat my expermiment. Human nature being what it is, some individuals so do not like an awful reality getting in the way of a beautiful story, their counter arguments will constantly be 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, assist them while they are still serviceable, don't fuss over them after they "signed off". We do not feed medication to dead individuals. Why do it to batteries? The experiment is described on "CAN BATTERIES BE RESTORED". Well, anyone can say what they desire about sulfation or desulfation, however including Epsom salt (solution= 8 teaspoonfuls Epsom salts liquified in 1 pint distilled water) paired with a 3 day drip charge helped my truck battery keep a better charge.
The battery carried out well through the winter after my treatment and is still going strong! I don't know how much longer it will live, however I will let you know when it lastly dies. Adios Shadmin - The portion of the 1 pint of water that you managed to take into the battery helped; the 3 days extra trickle charge assisted; the Epsom salts satisfied your belief - how to restore a dead car battery.
ALL the so-called solutions incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! However normally hurt!! What numerous posters like to believe is that THEIR!!! treatment made a difference!! BUT overlook all the other criteria of battery action incl temp, humidity etc in their attempt to make sense of a complicated subject!! (recondition old battery). The bare truth is that all automobile charge systems do not completely charge the l/a starter batt- however only around 14v- for several different reasons.
Bevan - Where does the acid that raised your SG come from? John- simply returned on line after week after changing ISP!!! The increased sg is due to the dollop in the 15 ml added of Inox Mx2 to each cell! IT absolutely is NOT due to decreasing sulfation & therefore raising sg!. how to recondition an old battery.