Managing The Battery; Installing The Battery - HP iPAQ H1900 series Quick Start Manual

Installing the Battery

The Pocket PC has a small internal backup battery that allows
you to change the main battery without losing RAM data
(user-installed programs and data) as long as it is replaced
immediately.
It is recommended that you fully charge the iPAQ Pocket PC
battery before setting up the unit, and recharge regularly. Your
Pocket PC uses some power to maintain files in RAM and the
clock. While working at your desk, keep the Pocket PC and
Charger Adapter connected through the USB Synchronization
Cable. When you travel, it is recommended that you carry the AC
Adapter, Charger Adapter plug, or an optional spare battery with
you.
Your iPAQ Pocket PC is shipped with the battery partially
charged.
User's Guide

Managing the Battery

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