Those statements might pertain to the old Ni-Cad batteries. Lithium-Ion are another animal.
1. Leave the battery in. In case of power failure the battery takes over. Leaving it plugged in causes no harm to the battery.
2. Store it full.
3. Cycling is not necessary.
The new Lithium-Ion batteries are a marked improvement over Ni-Cad.
Just wanted to get a review of laptop battery care-- what I do remember is the following (please correct me if I'm wrong):
-if used primarily on AC power, leave the battery disconnected except to do a charge/discharge cycle every month-ish
-store the battery with ~50% charge (not exactly sure why)
-try to let the battery discharge at least every so often (as opposed to constantly charging when half full)
Am I missing anything pertinent?