The charging light came on when I first plugged the machine
in. It went off a while later. So it seems to think the
battery is charged.
The backup battery, part number 1420-0507, was orderable from HP
a year or two ago, and reasonably cheap ($40?).
I don't have much experience with battery backup on the 867
(aka G40), but the equivalent HP 3000/9x7 systems would last
up to 15 minutes on the battery, and when AC power was restored,
the OS would come back to life and report "power failure",
but everything was still alive.
Stan Sieler sieler(a)allegro.com
www.allegro.com/sieler/wanted/index.html www.allegro.com/sieler