Read just a post on the forum about laptop batteries to get destroyed very quickly if plugged in at 100% to AC all the time.
It reminded me about an article I read a while back when I wondered about laptops’ battery life.
Here it is:
There’s no way to “overcharge” these batteries. When you get to 100% charge and leave your laptop plugged in, the charger will stop charging the battery. The laptop will just run directly off the power cable. After the battery discharges a bit, the charger will kick into gear again and top the battery off. There’s no risk of damaging the battery by charging it over its capacity.
Ultimately, it’s not clear which is worse for a battery. Leaving the battery at 100% capacity will decrease its lifespan, but running it through repeated discharge and recharge cycles will also decrease its lifespan. Basically, whatever you do, your battery will wear down and lose capacity. That’s just how batteries work. The real question is what makes it die more slowly.
I have also come across a variety of oftentimes contradictory recommendations on the subject.
Personally I have my laptop plugged in almost all the time when at home but I am willing to learn new ways of taking care of my laptops battery for it to last as long as possible.
What are your thoughts, experiences, practices, etc on this?