HP Pavilion XF315 Reference Manual page 53

• If you work with an application that uses an I/O PC card, exit the application when
you finish using it.
• See "Managing Power Consumption" on page 48 for other ideas about reducing
power consumption while the notebook is not in use.
In addition, follow these suggestions to extend the life of your battery.
• Do not leave a battery unused for long periods. If you have more than one, rotate
them.
• If you normally use AC power, make a practice of using the battery as your power
source at least once a week.
• Charge the battery regularly.
• For long-term storage, the battery must be charged 20–50% to minimize capacity loss
by self-discharge and to avoid deterioration of performance. Storing a fully charged
battery can cause higher self-discharge and reduce its discharge capacity—even after
recharging—compared to a battery stored when charged 20–50%.
• To maintain maximum battery capacity and accuracy of the battery gauge, perform
this procedure about once a month. Restart the notebook, press F6 when the HP logo
appears, and follow the instructions that appear onscreen. The process calibrates the
battery, and requires four to five hours to complete. You cannot use the notebook
during this process.
Batteries and Power Management
Using Battery Power
Reference Guide 53