That is quite common. The silliest thing you can do is to put all kinds of sulfates into batteries in the hope of resolving an issue. Urban legends will never pass away. Pencil lead can consist of some unusual compounds in addition to carbon (materials needed to recondition car battery). There are a lot of carbon powder manufacturers. Vehicle tires have to do with 50% carbon.
Does not cost an arm and a leg. Afdhal- I get cadmium from used NiCd cells-aaa or aa sizes- such as found in solar garden lights- after a few years they are thrown away as NiCd is worn- merely cut around top crimp with hacksaw, unwind 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 obtain Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release harmful fumes- do outside -do not breathe vapours!!! When cadmium is completely liquified( & sometimes the electrolyte cadmium mix is a lovely green, depending on quality of cadmium from cell maker!)- job done! Got ta say- the mix I have actually contributed to batt cells does not seem to assist! In reality- I got ta say the ONLY thing I utilized that worked was INOX MX2( in 1 batt up until now- 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 must be only lightly sulfated).
Still it is great at identifying o/c cell/s in batt- pulses increase greater with degree of o/c! have seen 1250 volts! Cut open, & broke down pos grid! in 1 cell-others nearly so!. how to recondition a wore out battery. Bevan - I would recommend improving the cadmium by making the cadmium you recovered from the NiCds the favorable in an electroplating cell.
Use a tin wire or solder wire unfavorable. Source of power can be 12V battery. Insert 220 ohm series resistor. The cadmium that gets plated onto the negative will be dendritic and pure. The actual voltage throughout the electroplating cell will be under 0. how do you recondition a dead car battery. 5V. The green you explain would be nickel contamination.
Bevan - That's innovative! Why didn't I think about that before? I will try it. John - You're one wise gentleman, thanks for the info. Bevan - I think I may have at long last handled to find out what cadmium sulfate does. It definitely electroplates out onto the unfavorable grid metal when the battery is deliberately pressed into regulated overcharge.
This assists the lead sulfate nearest the grids to end up being active again and to be converted into lead and sulfate ions. Repeated charging, discharging spreads the conductive environment gradually and progressively into the bulk of the lead sulfate. The procedure appears to have a limitation. reconditioning a battery. It would appear the secret to accomplishing 100% desulfation is to figure out how to get conduction to spread into 100% of the sulfate.
Adding gradually more just develops dendrites and triggers shorts. The explanations offered by desulation merchants that insoluble sulfation inevitably coats the plates when batteries are utilized which their treatment strips it away is pure fantasy. The sulfate stays right where it is. It is converted. While both favorable and unfavorable plates can end up being sulfated, the favorable sulfation just reverses when the battery is charged.
John - If I understand you properly, did you implied all the cadmium does is electroplating itself on the negative grid?If so, would not simply copper is excellent enough? Afdhal- it is just John's theory- but i would state cadmium does not just plate itself- needs driving- so does copper- BUT copper is a non laster in H2SO4! As are most metals! Lead lasts longer than most! Afdhal - No, copper and copper sulfate are not appropriate.
Cadmium has an electrochemical potential of -0. 4030V. Lead has an electrochemical potential of -0. 1262V. The electrochemical potential of cadmium is such that it avoids 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 potential Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will simply plate onto the negatives regardless and remain there, causing the plates to gas and to self discharge and to sulfate. The electrochemical capacities of aluminum, magnesium, potassium, sodium, etc. are all far to unfavorable, the metals far too reactive in battery acid, for anything of advantage to occur.
Bevan - It is not a theory. I ran the experiments. Constructed lead-acid cells in glass jars. I observed and determined (how to recondition an old 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 end up being REALITY- your findings MUST be duplicated by other like minded persons- can't see that happening right now- still, there is hope.
Bevan - I personally might not care less what individuals suggest about sulfation. I ran an experiment designed to answer yes or no, whether batteries can be desulfated. My experiment showed that one may get a quarter to a third short-term healing. I would not explain that as a "yes".
Others can quickly duplicate my expermiment. Human nature being what it is, some individuals so dislike an unsightly truth getting in the way of a lovely story, their counter arguments will constantly remain in words, not deeds. The base test: Desulfation remains a struggling industry. Something is not best. There is no conspiracy.
If you want batteries to last longer, work on them, help them while they are still serviceable, do not fuss over them after they "signed off". We don't feed medication to dead individuals. Why do it to batteries? The experiment is described on "CAN BATTERIES BE BROUGHT BACK". Well, anyone can state what they desire about sulfation or desulfation, however adding Epsom salt (service= 8 teaspoonfuls Epsom salts liquified in 1 pint pure water) coupled with a 3 day trickle 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 do not know just how much longer it will live, however I will let you know when it finally dies. Adios Shadmin - The part of the 1 pint of water that you managed to take into the battery helped; the three days extra drip charge helped; the Epsom salts satisfied your belief - car battery reconditioning.
ALL the so-called remedies incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! However normally harm!! What lots of posters like to believe is that THEIR!!! treatment made a distinction!! BUT overlook all the other criteria of battery action incl temp, humidity etc in their attempt to make sense of a complex subject!! (how to reconditioning car battery). The bare fact is that all automobile charge systems do not totally charge the l/a starter batt- however only around 14v- for several various reasons.
Bevan - Where does the acid that raised your SG come from? John- simply returned on line after week after altering ISP!!! The increased sg is because of the dollop in the 15 ml added of Inox Mx2 to each cell! IT certainly is NOT due to reducing sulfation & hence raising sg!. recondition dead battery.