HP iPAQ hx4700 Frequently Asked Questions Manual page 18

CAUTION: Before removing the battery to view the label located
Ä
underneath the battery, be sure to back up any unsaved information
or applications held in memory (RAM) or copy them to the iPAQ File
Store folder. Data and applications in RAM will be lost when
removing the battery or if the battery completely discharges. You do
not need to reinstall applications and data installed in the iPAQ File
Store folder because they are saved in ROM. Also before removing
the battery, check to see that the internal backup battery is fully
charged by tapping Start > Settings > System tab > Power
icon.
To view the Product ID and Serial Number label underneath the
battery:
1. Unlock the battery by sliding the lock button on the bottom of
the Pocket PC to the right or unlocked position 1.
14