Because the data and files saved on the HP Jornada are stored in RAM (Random Access Memory), maintaining a continuous power supply to the HP Jornada at all times is extremely important. If the HP Jornada runs out of power, all information stored in RAM is lost. Although the operating system and programs written to the HP Safe Store folder cannot be erased, any entered information, added programs, and custom settings are erased if power to the device is lost.
Data stored in Flash ROM on a CompactFlash card will be saved, even if the HP Jornada PC loses power. To protect the data, use HP Jornada backup to back up regularly to Flash ROM or to a CompactFlash card.
How long the device can operate without recharging the battery depends on the features and functions used most. Under typical use conditions, the battery included with the HP Jornada will provide approximately 12 hours of use (without the backlight). Note that some functions, such as listening to music or using CompactFlash cards, use considerable power and may reduce this time significantly.
When the HP Jornada displays a dialog box warning of low power, respond as soon as possible by recharging the main battery or replacing the backup battery. If you continue to use the HP Jornada until power reaches a critical low condition, a “Battery very low” message appears, and the HP Jornada shuts down automatically. The HP Jornada will not function unless it is connected to AC power. The backup battery does not provide enough power to operate the HP Jornada; it is intended only to preserve the data until the main battery can be recharged.
Charging the battery
Because the main battery is charged automatically whenever the HP Jornada is connected to AC power, simply connect the AC power adapter or place the HP Jornada in the USB cradle (connected to AC power) to recharge it when the power is low. While the HP Jornada is connected to AC power, the Notification button/LED indicates the charging status: