This backup battery is not non-replaceable, just only not advise to be replaced by user. You can get a backup battery for around US 2.00 from Mouser Electronics. Follow the link (
http://www.gethightech.com/Merchant2...=_x3_takeapart) to see how to take it apart. In step 10 you will see the connector of the battery, after moving out the motherboard, you will find a green pouch that the backup battery sit inside, cut the pouch andtake the battery out then replace it, put everything back and plug your power then your new backup battery will start to charge and let it charge at least 8 hours then your PDA will be alive again. Be careful to take those wire out and all responsibility of that machine by yourself.
