1237c8d91357
tech



Hello Jasen - 

--8<--cut 

CA>>>> Three rechargeable AA batteries would be 3.6 since they
CA>>>> are 1.2 per cell. 

WC>>> Yeah but I'd have to snag the charging current from
WC>>> either the old onboard CMOS battery positive connection
WC>>> or add a limiting resistor from a PS source or they self
WC>>> discharge in a month, BTW I'd thought of this one. 

CA>> Was not aware they would discharge. 

JB> NiCd charge has a shelf-life of about 3 months, that's one
JB> of the reasons why they're flat when you buy them. 

I stopped buying NiCad some years ago. My children kept
mistaking them for regular batteries and tossing them into the
garbage. I decided to give up. :-\ 

JB> FWIW: 

JB> CMOS clock/nvram chips want 3 volts, (some of the old ones
JB> are really fussy). When driving them from a 3.6v NiCd they
JB> usually stick a silicon diode in series to eat the excess
JB> 0.6v the charging circuit is fed from +5 via another diode
JB> and a resistor 

I never have been familiar with the details of motherboard
electronics but know enough to understand your reply. 

If I ever had a need to alter the electronics I would require
the assistance of people who have kept up with the details. Not
sure I can see well enough to solder in a diode or even a
resistor anymore. Haven't tried in many many years now. 

>
>        ,                          ,
>      o/      Charles.Angelich      \o       ,
>       __o/
>     / >          USA, MI           < \   __\__
 

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