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this post was submitted on 28 Dec 2023
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With that explanation I am still not clear whether the statistic on percentage of recycled batteries was car batteries, the battery industry as a whole, li-ion batteries, rechargeable batteries, ... I am honestly interested in which statistics you are referring to. Especially the evolution of recycling of car batteries and the regions where recycling and collection occurs.
It seems you are adding uncertainty and doubt on the topic of battery recycling which I'm not sure is grounded. We are well past the point in our environment where we can live our current lifestyle in the way we live it today. We have to adapt to a different lifestyle and make strategic bets. It seems clear that we should stop pumping up oil and electric cars may help there. I'm looking for research that indicates that current car batteries are waiting in stockpiles to be recycled but no plants exist to recycle them.
As far as I can tell, there are not even enough bad battery packs around to suit the diy hackers to reuse them for home energy storage and with some luck your research points me to where I can find them.
I can grab any Li-ion chemistry I want from Digikey and use it for experiments at home.
I'm actually a hobby electrical engineer and moderator of /c/ece here and like to discuss electrical engineering.
Batteries are more of a chemical engineering thing, but experiments are conducted with electrical inventions (opamps, microcontrollers, pcbs).
In any case, Digikey.com has plenty of batteries. But used batteries are risky, especially with how explosive Li-ion is.
IMO, Hobbyists shouldn't be experimenting with Li-ion (or unprotected Li-ion) without substantial fire safety measures. It's a well known explosive risk in our field.
But if you really want to experiment, buy a fire extinguisher and the old 'Bucket of Sand' trick. Keep watch over the batteries during your experiments, keep flammable objects away, leave the battery test inside the bucket of sand and keep the fire extinguisher closeby.