Comment on is our battery/junk drawer dangerous?
JohnnyEnzyme@piefed.social 5 days agoGenerally catastrophic failures happen when a battery is damaged
I’m not a chemist or ‘battery scientist,’ but I understand that Li+ ion cells can indeed be heavily damaged without showing any outward traces of such. That is, internal filaments can build up over time, and a damaged cell can be at risk when charging (as you note above, I believe).
That said, there may be associated swelling that tends to indicate such damage, but I’m not sure that’s always true. A cell with a cheaply-made casing would be a combined risk.
DataCrime@lemmy.dbzer0.com 4 days ago
True. There’s lots of pretty dodgy cells floating around these days, and they are often marked as being from more reputable manufacturers… I’m speaking mostly of packaging batteries 18650 and larger (probably smaller too) rolled type batteries, though I assume there’s shitty prismatic/pouch types as well.
I didn’t see anything like that in OP’s image, which is why I wasn’t advising undue caution. Personally I try very hard to stick with reputable brands and establish manufacturers when playing around with bare cells, power banks, weird Amazon gadgets, etc.
I’m certainly not a proper expert either. I do try to exercise an abundance of caution with unknown or questionable products, damaged cells, etc.
Years ago when getting into quadcopters/drones I read some good advice; high powered batteries should be treated more like fuel than traditional NiCad/NiMh batteries. That advice has always served me well.