Powermac G5: Testing PRAM Battery?

Discussion in 'PowerPC Macs' started by VideoBeagle, Jul 15, 2013.

  1. VideoBeagle macrumors 6502a

    Joined:
    Aug 17, 2010
    Location:
    App Q&A testing by request.
    #1
    Searching has turned up nada, so I'm guessing there isn't way....

    How do you test your PRAM battery...is there a program?

    Remove it and test in a something?

    (I have a GB Electrical GMT-18p multi Tester that i ...don't really know how to use :) )
    [​IMG]
    (kinda like this one)

    Just figure it's gone bad and get a new one?
     
  2. Swampus macrumors 6502

    Swampus

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    Winterfell
  3. Graveyard macrumors regular

    Joined:
    Jul 29, 2009
    Location:
    Romania
    #3
    You mean to tell me that Romania is the only country in which kids learn how to use a simple voltmeter in phisycs classes? Sheesh!!!
    You connect the red probe to the hole that has a + sign next to it. The black one to the other hole on the multimeter that has a - sign next to it. Then you turn the dial on the multimeter to a value higher than 3 volts, since the pram battery gives you 3,6 volts. You must remove the battery first, of course, and make sure you remember its position. You place the red probe on the plus side of the battery and the black probe to the bottom, the minus side of the battery, and see if there's any juice left in it. If there's less than 3 volts left, you should replace it. If it shows you 3,6 - 3,7 volts, then it's still in good shape.
    There, it's not exactly rocket science, is it?!
     
  4. VideoBeagle thread starter macrumors 6502a

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    Aug 17, 2010
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    App Q&A testing by request.
    #4
    So the answer to the original question is "No, there's no program?"
     
  5. Swampus macrumors 6502

    Swampus

    Joined:
    Jun 20, 2013
    Location:
    Winterfell
    #5
    No, but if you unplug your G5 for a few minutes and retain your time and date settings, then it's probably still good. If you lose your time and date settings, that's usually an indication that it's bad.

    To verify, use your multimeter and Graveyard's nicely detailed instructions.
     
  6. VideoBeagle thread starter macrumors 6502a

    Joined:
    Aug 17, 2010
    Location:
    App Q&A testing by request.
    #6
    Well it passed this test (unplugged, both power and network for a bunch of hours, then on with network unplugged and clock was still correct) so guess that's all good.

    Thanks!
     

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