One of the biggest factors is heat. Lithium batteries don't like high temps.
Also, they really hate sitting at 100% SoC, though I'm not sure if that contributes to the swelling. 80% SoC is commonly cited as a healthier place for lithium batteries to sit when "fully charged," and, for that reason, some laptops (and other devices) allow you to limit the maximum SoC to 80% if your laptop sits plugged in most of the time.
Like, in general?
One of the biggest factors is heat. Lithium batteries don't like high temps.
Also, they really hate sitting at 100% SoC, though I'm not sure if that contributes to the swelling. 80% SoC is commonly cited as a healthier place for lithium batteries to sit when "fully charged," and, for that reason, some laptops (and other devices) allow you to limit the maximum SoC to 80% if your laptop sits plugged in most of the time.
And overcharging too, like if you plug it in 24/7, it's bad
Wait really!?
Yeah at least for li-ion they prefer to be around 30-70% charged for as long time as possible for maximum lifespan
Damn