this post was submitted on 24 Apr 2025
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Important note near the end of the article - they aren't saying we should cook batteries really -
This is a good old idea that goes back to the days of desulfating lead batteries with powerful shocks of high-amperage current. Might just need a special Healing Charger that applies the right voltage/current to dissolve the bad crystals in lithium-ion systems
Well, there is some data/rumours out there, stemming from a Dutch Tesla forum, that suggests that some fast charging might be beneficial for battery longevity. This seems to corroborate that. I can't remember the case for always fast charging, though.
I remember recovering dead 18650 cells from laptop batteries and "restoring" them with a 12V modded PC PSU. Quite a few of them actually started working again and had some capacity for a few tens of additional cycles. Those cells were never left unattended in a charger and they were always only used in a device you could chuck in a moment's notice.
10/10 do not recommend.
How did that process work? Did you just connect the +/- ends of the cell to the +/- 12v wires of the PSU and let it feed from the high-amp outputs? Imagine there's plenty of amps on the GPU and CPU power wires
Oh God I can already see all the questionable "Restorer Chargers" and the like from Temu that will be more likely to burn down the house...
With electric cars you might not even need a special charger so much as a special charging cycle. Its already the norm for cars to tell the charger what voltage and current they want, and its already the norm for cars to carefully control their battery's temperature during charging.
That's not to say you'd necessarily be able to do this with just a software update, but its not too far off from the current paradigm.
Yeah that's a good point. Ours uses the same refrigerant system as the AC to cool the battery, and the actual "charger" for the battery is inside the car being controlled by its software etc. The cables that plug in on the outside are technically just power wires, with the charging brains inside the car. That would be amazing if they could update the software to rejuvenate the battery once a year or something.
it would almost certainly need to be done at a fast charger, not at home unless it could do only a few cells at a time. Remember the golden rule: "Don't set the house on fire by overloading the wiring".