The battery voltage lies in parallel with the ADB voltage available from
the power supply. It's function is to supply memory voltage to maintain
the settings in the CUDA chip section that remembers user settings for
various functions one can set for preferred and personalized machine
parameter info like the clock and screen, etc.. If a mac/starmax is
unplugged, the battery should carry the settings over until the s/m is
again plugged in. If the battery is below voltage or dead, the settings
will be garbled, and the m/s may have serious trouble starting up the
next time.
I watched many power supplies be replaced in ignorance about the
battery--and endless troubleshooting on all sorts of symptoms. Terry's
battery didn't last 7 years. It simply didn't matter until some machine
condition changed and the CUDA got garbled, and signaled a problem.
The battery life is essentially its shelf life; internal corrosionof the
electrolyte material is inevitable, and the battery selected in the oem
was simply a long life alkaline battery with a decent voltage drop-off
curve. The power supply is not a charger; the battery clunks along until
its insides thicken and poops on its voltage.
Changing the battery ought to follow the manufacturer's estimate of its
battery life. (Often 3 to 4 years.) I don't care if anyone ever changes
them or wants to brag about how long their's has lasted.
Don't be cavalier about the battery.Think about ir, the battery musty
have been built in there for a reason, nicth var?
In any case, when the battery voltage drop below the level to keep
accurate memory settins in the CUDA, they'll likely have to be reset
either from the keyboard or the little red CUDA button inside. That
takes the memory settings back to the designer's default settings--and
you'll reset the date and such.
Thanks,
Bob Wulkowicz
Hermann Ertl wrote:
Date: Wed, 17 Aug 2005 17:01:07 -0500
Subject: Re: battery
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
It sure can't hurt to replace the [battery] BEFORE [it goes] awry.
Interesting.
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