Preventive maintenance for notebook PC and its Li-Ion battery pack

Here are some preventive maintenance to notebook PC and its Li-Ion battery pack:

To defragment the notebook PC hard disk at least once per 1 to 2 months, it depends on the usage of the hard disk.

For daily use, use notebook PC together with AC and battery power, but use battery power once per month, fully drain it and charge it up again.

When battery is fully charged 100% and notebook PC is OFF (Not in use), do not leave AC power ON and overcharge the battery for more than 3 hours; If notebook PC is ON (In use), can continue charge the battery even the battery is 100%, ie. Use your notebook PC together with AC and battery power.