[comp.sys.amiga] M501 battery problems

GELSON%SBU.UFRGS.ANRS.BR@uicvm.uic.edu (Gelson Dias Santos) (10/13/90)

    On message <373@shrike.AUSTIN.LOCKHEED.COM> someone write:

>I recently began having problems with the battery backed clock in my Amiga 500.
>The clock is in my M501 512K memory expansion board from Microbiotics.  When I
>reboot, cold or warm, I get a Battery Backed Clock not found error when I do a
>"setclock opt load" from my startup-sequence.  I removed the M501 and checked
>the voltage on the battery with my trusty voltmeter and got a reading of 4.25V.
>Is this enough?  Should it be 5V?  Is my battery bad or is it something else?
>I have owned the M501 and my Amiga for 2.5 years and have never had any
> problemslike this, so any help would be greatly appreciated.  Thanks!
>-------------------------------------------------------------------------------
>                        vervalin@austin.lockheed.com
>-------------------------------------------------------------------------------

   Well, I don't know what kind of battery M501 uses, but if it has a NICAD
battery, maybe you must to change them. According to Amazing Computing vol. 5
no. 6 (page 36), the life cycle of NICAD battery varies between 3-5 years. A501
 expansion from Commodore uses this! In this article (a memory/clock board
project) they use a lithium battery, because it doesn't need to be recharged,
and the time life is aproximated 10 years.

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