Backup battery

[Ken Stone]

I have a couple of AAA alkaline cells looking after 2k of CMOS SRam on a
couple of circuits. The batteries have been in circuit since 1984.

>By far the easiest thing to do is remove the NiCd's, disable the charging
>circuit by removing the blocking diode or current-limiting resistor, and
>replace the whole mess with a couple of name-brand alkaline batteries in
>plastic holder stuck onto the PC board with double-sided tape. This is what
>a lot of pinball enthusiasts are doing these days (I've seem more than one
>Bally logic board completely eaten up--that's what happened to my KISS
>machine). You just have to remember to replace the batteries every five
>years or so--the ones they make these days should last that long.
>
>Terry Bowman, KA4HJH
>
>
>
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                Ken Stone  sasami at blaze.net.au
                   ** Catgirl Paradise **
               <http://www.anime.net/~kens/>
         ** Australian Miniature Horses and ponies **
             <http://www.blaze.net.au/~sasami/>
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