To Get The Most From Your Battery - HP OmniBook 2100 Reference Manual

To get the most from your battery

The following are some further suggestions for the best management of your
OmniBook batteries.
Do not leave batteries unused for long periods of time. If you have more than
one, rotate them.
If you normally use ac power, make a practice of at least once a week using the
battery as your power source.
Unplug the ac adapter when the computer is not in use.
To preserve the life of your battery, be sure to charge the battery regularly.
For long-term storage, the battery must be charged at 20-50% to save capacity
loss by self-discharge and to avoid deterioration of battery performance. In a
discharged condition, the battery voltage decreases faster. Storage in a 100%
charged condition can cause higher self-discharge and deterioration of
discharge capacity—even after recharging—compared to storage in a 20-50%
charged condition.
Managing Battery Power
3-11