It may still balloon limited to 80%, but it’s far FAR less likely.
Lithium ion batteries are happiest at about 40% charged so if you’re storing them that’s about where you’d want to change them to. 100% charged isn’t very good for them, and 0% is VERY bad for them.
is it so you can leave a phone plugged in forever without the battery ballooning?
It may still balloon limited to 80%, but it’s far FAR less likely.
Lithium ion batteries are happiest at about 40% charged so if you’re storing them that’s about where you’d want to change them to. 100% charged isn’t very good for them, and 0% is VERY bad for them.
It’s so you can extend the life of your device by not charging it to 100% all the time.