This could be relevant for current Jornada 680/690/7xx series owners.
Spotted someone selling several used batteries here:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180467806498&ssP...
Here's the descriptions:
DESCRIPTION:
* HP Jornada PDA internal battery for 680, 690, 720, 728 series
* Fits with compatible part number: F1262-80001, F1281A, F1281B or F4361A
* Battery Technology: Li-Ion, 7.2 Volts 1150 mAh
* 100% OEM Compatible
CONDITION:
Used but in good condition. Guaranteed to be 100% functional!
FYI.
Konker