> If you use your notebook primarily on AC, battery is charged and kept on “storage” until you unplug from AC. Over the years, this is equivalent to a battery s

> If you use your notebook primarily on AC, battery is charged and kept on “storage” until you unplug from AC. Over the years, this is equivalent to a battery stored on a box. I'm not sure what you mean, by default most laptops will charge to 100% and keep trickle charging it to that level consistently while on AC. Setting a charge max of 40% would be ideal, but there is point where you want to maintain some level of runtime when removed from AC, so 80% is a reasonable compromise.