Check the following >> http://hpcc998.external.hp.com/pressrel/08nov95b.html
To paraphrase: OGOs pre Ser No.SG54402000 would not use the backup battery
to maintain memory when the main batteries were removed.
Now, FYI, besides that here is another way to loose data...
In the first week alone I used up 4 pairs of AA alkalines. They died just
as I power-on the unit and they couldn't sustain the sudden current drain as
alkalines have a controlled discharge. This causes the alkalines to be
electrochemically damaged internally and they cannot provide a sufficient
current any more to fully power the OGO, in my case all the data data was
lost and a Hard-reset was the only way to get the OGO working again. Since
then I have researched the AA options and have gained some confidence with
some new 750mAH NiCd, but having said that I have not put in any new data
until even the NiCds prove themselves.
Leaving the 'Touch screen on' enabled draws a current from the batteries to
power just the pressure sensing part of the screen, usually this was
responsible for my data losses with alkalines.
When I was confronted with the problem at first I could never figure out why
the batteries died more quickly the less I used the OGO!
>>>At 11:30 03/04/96 -0800, you wrote:
>>Robert H. Herzstein wrote:
>>>
>>> I didn't hear of any OG's being recalled. What's that about??
>>> Information seems to be disolving, but it involved the first several
>>batches. Those with a SG54 series serial number. The problem was that if
>>you left the 'touch screen to turn on' checked and changed the batteries,
>>you could lose the data in RAM. I never had the problem, but I figured I
>>might as well get a new OG after 4 months. If you are not sure whether
>>you are efected, give HP a call. There may be info in one of the OG FAQs.
>
>My Omnigo serial number starts with SG54. I guess I'd better call HP....
>
>I have noticed that when the OG gives a battery low warning it
>automatically turns off the "touch screen to turn on" option. Could that
>be related? Did they change anything else in the later units?
>
>-Robert
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Robert Holmes Herzstein
>
>RobHerz@loop.com
>
>
----------------------------------------------------------------------
Pointer Control Systems Ltd. Phone - intl + 353 1 8300533
89c Lagan Rd., Fax - intl + 353 1 8300543
Dublin Industrial Estate., e-Mail- pointers@iol.ie
Dublin 11,
Ireland.
-- HVAC, Energy Management and Process Controls Systems Specialists --