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Thread: Optima Yellow Top keeps dying...

  1. #1
    FLAC edrex's Avatar
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    Angry Optima Yellow Top keeps dying...

    Dead batteries have been somewhat of a problem since I put the carPC in. For the most part everything is fine, but it seems if I don't drive the car for a couple days the battery loses most of its charge. I got a Optima Yellow Top in hopes of solving the problem but that did not work, I have a dead battery this morning.

    So, how do I go about figuring what is draining it? The PC hibernates when it shuts down. I thought hibernation does not use power, but I could be wrong. Could it also be that the alternator is not able to charge enough when the PC is running? I'm at a loss as to what to do here so any helpful advice is appreciated.

    Thanks,
    ed.
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    How is the pc connected? What other devices are you powering?

  3. #3
    Variable Bitrate 84RegalRider's Avatar
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    go with exide.

    but something is draining your batt probably.
    best way is to turn car off, disconnet batt, and put an amp meter on it.
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    FLAC edrex's Avatar
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    PC is connected with an Opus 150. I also have an amp, but that turns off when the power goes down. Other devices running off the PC are OEM GPS setup and XM. I also have a separate DC-DC power supply for my monitors, but again, that should be off when no power is run to it.
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  5. #5
    FLAC edrex's Avatar
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    Quote Originally Posted by 84RegalRider
    go with exide.

    but something is draining your batt probably.
    best way is to turn car off, disconnet batt, and put an amp meter on it.
    Don't know what exide is. Are you saying to put the amp meter to the battery? If its dissconnected how can I tell what could be draining?

    Sorry if these are dumb questions, but I;m new to the whole electrics scene.
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  6. #6
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    Exide vs. Yellow Top in this case is a moot point. Having an Exide will not solve your problem over the Optima you've already bought.

    What you need to do is trace down what's pulling power when the car is off. Do you have a Multimeter? If so, see if it can meter amperage draw (with like, a 20A setting)

    What you do then is disconnect the positive terminal of the battery, then connect the multimeter between the positive of the battery, and the positive lead that was connected to it. That will tell you how much current is being drawn while the car is off. Let us know what this is.

    Then you need to start going through and finding the fuse that the power draw is coming from. Check the fuse for your CarPC stuff first. Same procedure. Plug the battery back in, then pull the fuse out of the holder, and put one side of the multimeter on one side of the fuse holder, and the other side into the other side of the fuse holder. Look around for where the majority of the current draw is.

    Once you figure out what's drawing the current, we can go from there.

  7. #7
    Maximum Bitrate binary.h4x's Avatar
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    Did you install your amp at the same time as the carputer? My money is on the amp.
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  8. #8
    MySQL Error MatrixPC's Avatar
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    Recently, my the battery in my Supra keep dying on me. Normally I can leave the car park for 10-15 days without problem starting it up.
    I found out that the SDC in my custom build sproggy PSU doesn't cut off power to the PSU. That put the PSU in standby the whole time. Now if I don't drive the car for 2 days, I will have to push/pull/jump start the car on the 3rd day.

    If you Opus hasn't been monified, it probably the source of the problem.
    Unhook the carPC to see if the problem still exist.
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  9. #9
    FLAC edrex's Avatar
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    Quote Originally Posted by Jahntassa
    What you do then is disconnect the positive terminal of the battery, then connect the multimeter between the positive of the battery, and the positive lead that was connected to it. That will tell you how much current is being drawn while the car is off. Let us know what this is.

    Then you need to start going through and finding the fuse that the power draw is coming from. Check the fuse for your CarPC stuff first. Same procedure. Plug the battery back in, then pull the fuse out of the holder, and put one side of the multimeter on one side of the fuse holder, and the other side into the other side of the fuse holder. Look around for where the majority of the current draw is.

    Once you figure out what's drawing the current, we can go from there.
    This will have to be a project for Monday. I will need to get the battery charged and tomorrow I work all day. Thank you for the clear instructions, now knock on wood that I don't screw it up and electrocute myself!
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  10. #10
    FLAC edrex's Avatar
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    Quote Originally Posted by binary.h4x
    Did you install your amp at the same time as the carputer? My money is on the amp.
    Within a few days of each other. Hopefully the MultiMeter will show if the draw is the amp or the PC.
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