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Mother board battery

Discussion in 'Hardware' started by CD ROM, Jan 25, 2009.

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  1. CD ROM

    CD ROM Thread Starter

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    Does the mother board battery that keeps the time affect the computer operation if it runs down?
     
  2. Alex Ethridge

    Alex Ethridge

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    Your computer may "forget" the time and date when it is turned off and also may revert to "default" BIOS (aka CMOS) settings. But, if the time is correct when you turn on your computer, the battery is doing its job.

    If you are worried about it and the battery is two or more years old, you can replace it for under six dollars. It's an easy snap-in thing to do. The only problem you might run into would be if yours is one of those systems that, due to the way it is constructed internally, has made the battery difficult to access. Most are easy, though.
     
  3. DaveBurnett

    DaveBurnett Account Closed

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    The default settings will almost certainly make your machine run slower as they are failsafe ones.
     
  4. Alex Ethridge

    Alex Ethridge

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    Good point; but, there are some (especially older) boards that had a 'fail-safe defaults' (safe and slow) and a 'performance defaults'. I haven't seen that differentation lately, though.
     
  5. CD ROM

    CD ROM Thread Starter

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    Thanks for the info. Please look at this post " Imminent hard drive failure" . The battery question was related to this.
     
  6. Alex Ethridge

    Alex Ethridge

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    Hmmm...

    There's no link.
     
  7. DaveBurnett

    DaveBurnett Account Closed

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  8. Koot

    Koot

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    Question: Do the monitoring programs that read the VBAT voltage actually read the battery's voltage or does it read the voltage being supplied to that part of the motherboard by the power supply? In other words, could I have a weak CMOS battery yet still be getting a 3 volt reading from the monitoring readout simply because the PC is "On" and voltage is being supplied to that circuit by the power supply? Just curious because if I rarely turn off my PC (or only for a few minutes when I do) I'd never know the CMOS battery was weak and needed to be replaced.

    My battery is 6-7 years old but the reading I get is 3+ volts. I rarely turn my PC off...and then only for a few minutes. I may have a very weak battery and just don't know it...

    VBAT Battery 3.10 V
     
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