Gateway MC73, Reference Manual

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Storing batteries
Do not charge up the battery, then store it away. A
stored battery should be used every three to four
weeks. Let the battery fully discharge, then recharge
to 40% if you plan to store it again. If you store a
battery for longer than three to four weeks, the
battery could fully discharge because the battery
circuitry itself consumes power.
If you have a spare lithium-ion battery, use one
exclusively and keep the other cool by placing it in the
refrigerator. Make sure that it is wrapped protectively
and that nothing will be dropped on it. Do not freeze
the battery.
Do not use old batteries. Avoid purchasing spare
lithium-ion batteries and storing them for later use. Do
not buy old stock, even if it is sold at clearance prices.
While it makes sense to have 2 or 3 extra batteries, so
that you always have a fresh one charged up and ready
to go, if you buy batteries and store them for years,
they may not work when you decide to use them.
Consider removing the battery from your notebook
when running on fixed power. However, remember
that when you have removed the battery from your
notebook while using it with an electrical outlet, the
automatic battery charger no longer keeps the battery
charged.
Cleaning CDs or DVDs
Wipe from the center to the edge, not around in a
circle, using a product made especially for the purpose.
Caution
When the battery is in the notebook and the notebook is
running on AC power, the battery constantly charges, even though
it has a full charge. This reduces the life of the battery. If the battery
is fully charged and you want to run on AC power, remove the
battery.