Storing A Battery Pack - HP Compaq Series Hardware Manual

Storing a Battery Pack

If a notebook will be unused and unplugged for more than
2 weeks, remove any battery packs and store them separately.
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CAUTION: To prevent damage to a battery pack, do not expose it to
high temperatures for extended periods of time.
High temperatures accelerate the self-discharge rate of a stored
battery pack. To prolong the charge of a stored battery pack, place
it in a cool, dry place.
Use the following table to estimate how long you can safely store
a battery pack. The storage times provided are based on a battery
pack that contains 50 percent of a full charge. A fully charged
battery pack can be safely stored for longer times; a battery pack
containing a lower charge can be safely stored for less time.
Calibrate a battery pack that has been stored for 1 month or more
before using it.
Temperature
Range (°F)
115° to 140°
79° to 113°
32° to 77°
Hardware Guide
Temperature
Range (°C) Safe Storage Time
46° to 60° Less than 1 month
26° to 45° No more than 3 months
0° to 25° 1 year
Battery Packs
3–19