The “memory effect”, or the need to “refresh” or “deep-cycle” the battery by completely discharging before recharging, is stale knowledge from the time of NiCad and NiMH batteries. Lithium-ion batteries don’t suffer from the memory effect.
It’s also not bad to leave your laptop plugged in. In fact, it’s a good thing to keep it plugged in whenever you don’t need to be running on battery power.
via Marco.org. Do read the whole article. Very informative.
