Just continuously on power saving mode?
Well, the worst thing for batteries: Too much heat and that they stay on the charging cable, even though they are already full. Avoid that, then a lot has already been done.
The charging cable when the battery is full, since lithium batteries are in the laptop batteries, because they must have a battery management system in them that will NEVER be overloaded. The old rule that it damages the battery if the computer is permanently connected to the charger dates back to the days of NuCd batteries in laptops., Just like the rule, which is still often read, to run the battery completely empty before charging, which is more likely is bad for modern batteries.
If you want to store your laptop, it is best to reduce the battery to about 75%.
