Introduction
	Backup batteries
	Main batteries
	Removing HP Jornada batteries
	Removing HP Palmtop batteries
	Removing HP Omnigo batteries

Introduction

This document describes how to remove the main and backup battery from an HP Jornada, Palmtop, or Omnigo device.

CAUTION: Removing both the backup and main batteries will permanently erase all data if the device is not attached to AC power.

Backup batteries

The backup battery protects the data when the main battery runs out of power. The backup battery should be replaced at least every six months: sooner if the device is operated with a low main battery. If the backup battery becomes drained, the device will begin to lose data and behave abnormally. All backup batteries are CR2032 batteries that are generally found wherever batteries are sold.

Main batteries

The main battery provides power to the device when it is not connected to AC power. Click here to buy replacement batteries online from HP or other retailers. Removing the main battery is one of the steps in resetting all information on a device.

Removing HP Jornada batteries

The information in the following table applies only to HP Jornada devices.

CAUTION: Replacing the batteries in proper order is crucial. Replace the main battery, connect the device to AC power, and then replace the backup batteries (when applicable).

Model name	Removing the main battery	Removing the backup battery
HP Jornada 420, 430, and 430se	The main battery is located on the left edge of the device on the bottom. Insert the stylus into the small hole above the battery compartment door to release the battery door. Slide the door down to remove it. Slide the battery out. Reverse the process to reinstall the battery.	No backup battery.
HP Jornada 520, 525, 540, 545, 547, and 548	The battery is internal and cannot be replaced except at the factory. Contact support if you think the battery needs to be replaced.	No backup battery.
HP Jornada 564, 565, 567, 568, and 928	The main battery is located on the back of the device. Hold the main battery lock (above the right corner of the main battery) in the OPEN position and then slide the battery out.	The battery is located on the left side of the device. Use the stylus to hold the backup battery lock in the OPEN position, and then slide out the backup battery tray.
HP Jornada 680, 680e, 690, and 690e	The main battery is located on the bottom of the device at the back. Slide the small latch on the bottom of the device to release the battery from the device. Remove the battery. Reverse the process to reinstall the battery.	The backup battery is located inside the CF card slot door on the bottom left hand side of the device. Remove the tiny screw on the corner of the square plate on the CF card slot (a small Philips screwdriver is provided with new devices to remove this screw, but any small Philips screwdriver will work). Remove the plate and use the stylus to remove the old battery. Reverse the process to reinstall the battery.
HP Jornada 710, 720, and 728.	The main battery is located on the bottom of the device at the back. Slide the small latch on the bottom of the device to release the battery from the device. Remove the battery. Reverse the process to reinstall the battery.	The backup battery is located under the CF card slot door on the bottom right hand side of the device. Open the CF Card slot and use the stylus to remove the old battery. Reverse the process to reinstall the battery.
HP Jornada 820 / 820e	The main battery is located under the front of the device on the bottom. Slide out the battery. Reverse the process to reinstall the battery.	The backup batteries are located on the left edge of the device near the front. Slide down the backup battery plate. Attached to the plate is a strip connected to a tray that holds two backup batteries. Pull the plate and strip away from the device to remove the tray. Reverse the process to reinstall the batteries.

Removing HP Palmtop batteries

The information in the following table applies only to HP Palmtop devices.

CAUTION: Replacing the batteries in proper order is crucial. Replace the main battery, connect the device to AC power, and then replace the backup batteries (when applicable).

Model name	Removing the main battery	Removing the backup battery
HP Palmtop 95LX, 100LX, 200LX, and 1000CX	The main battery cover plate is located on the bottom of the device at the back. Slide the battery cover plate off and remove the two AA batteries. Reverse the process to reinstall the battery.	The backup battery is located on the right edge of the device over the infrared port. Slide down and remove the backup battery plate. Removing the plate exposes a small gray tab. Pull the tab away from the device to remove the tray containing the backup battery. Reverse the process to reinstall the battery.
HP Palmtop 300LX, 320LX, and 360LX	The two AA main batteries are stored under the battery plate on the bottom of the device, below the hinge for the cover. Slide the cover plate off and remove the two AA batteries. Reverse the process to reinstall the battery.	The backup battery is found under the small square door on the bottom of the device. Open the door and use the stylus to remove the old battery. Reverse the process to reinstall the battery.
HP Palmtop 620LX and 660LX	The main battery is located on the bottom of the device at the rear. On the bottom is a small latch that releases the battery. Slide the latch over to release the attached battery from the rear of the device. Remove the battery. Reverse the process to reinstall the battery.	The backup battery is found under the small square door on the bottom of the device. Open the door and use the stylus to remove the old battery. Reverse the process to reinstall the battery.

Removing HP Omnigo batteries

The information in the following table applies only to HP Omnigo devices.

CAUTION: Replacing the batteries in proper order is crucial. Replace the main battery, connect the device to AC power, and then replace the backup batteries (when applicable).

Model name	Removing the main battery	Removing the backup battery
HP Omnigo 100 / 120	The main battery cover plate is found on the bottom of the device near the back. Remove the cover and remove the batteries. Reverse the process to reinstall the battery.	The backup battery is located in a compartment on the left edge of the device near the display. Slide out the battery tray to replace the battery. Reverse the process to reinstall the battery.
HP Omnigo 700LX	The two AA main batteries are stored under the battery plate on the bottom of the device, below the hinge for the cover. Slide the cover plate off and remove the two AA batteries. Reverse the process to reinstall the battery.	The backup battery is located on the right edge of the device. Slide off the small plate over the infrared port. Removing the plate exposes a small gray tab. Pull the tab to remove the tray containing the backup battery. Reverse the process to reinstall the battery.

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