** Reply to note from SurvPC Discussion List <[EMAIL PROTECTED]> Sun, 4 Apr
1999 13:41:37 -500
>
> Hi, The Compaq DeskPro 286/12 that I have here, the 12.5MHz version I have
> uses a 7.2-volt CMOS backup battery. Compaq advised that one probably
> should not vary the voltage more than about .5 volt to either side of the
> 7.2. This would mean that a 6-volt set-up, as in a battery holder that
> could take four pen light or AA batteries would not provide enough voltage
> to propperly maintain the CMOS settings. I heard of the existance of one of
> those battery holders that could take five AA batteries, which would be just
> about right, but I've never been able to locate one. I'm still looking for
> one, by the way.
>
I soldered 4 alcalic penlights together, and now I have two Deskpro 286/12 running on
them (one set in each,
of course). Compaq says it takes a trained technician to replace the batteries, so I
think there is no reason to
take their advices to seriously. Before the CMOS was probably running on 1-2 volts,
four penlights give some
5,8 volts at their best. I would not use more than 7 volts though.
Per B.
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