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Carputer on standby when car is off?

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  • Carputer on standby when car is off?

    How would that work?
    how long could a carputer stay on standby before the batteries would need charging?
    I believe that would be the best way for a quick startup of the carputer, and to stop it from draining all the battery if left alone for a while, one could set a timer connected to a relay which shuts the carputer down before it deains the battery completely

  • #2
    my guess.... with a NEW battery maybe 5-6 hours. Mine's gone longer before but i wouldnt risk it. As for the timer you refer to.. you could just buy a uSDC. Thats what i use to control my computers hibernation. Works perfectly too.
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    • #3
      it's kinda clumsy to do this with a PC. I'm using a laptop so this would work perfectly for me. I don't even need the car battery. It works like this. Car turns off. Latop goes into Standby. After 6 hours or if the laptop battery drops below 30% (arbitrary) which ever comes first, laptop goes into Hibernate.
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      • #4
        hmm, yes.. what I am doing is researching on the fastest way possible to make a windows install run after the car has been standing for a while

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        • #5
          If you are not looking to have a second battery, you are probably looking at using a laptop. The setup of a laptop is specifically setup for hibernation/standby use. You are going to get much more options with a laptop.
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          • #6
            I use a laptop in my setup and have a remote switched on my dash to turn the laptop on and off. I have soldered the remote wire to the power switch on the laptop's docking station, also the laptop is set on hibernate when it goes off and comes on in about 5 seconds.. Cool huh...

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            • #7
              There's been a LOT of discussion on this here -- search and see what you find -- but I currently suspend to standby on my installed system and it has so far lasted several days without draining the battery. I cut power to *all* periphials, including USB devices, audio, etc. to minimize current draw in standby. I use an Opus 90W with VIA M6000, 512MB memory.
              My $0.02.

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              • #8
                I have mine on stand-by too, and I've left the car for a few days and the car started with no problem.
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                • #9
                  Originally posted by Cris
                  I have mine on stand-by too, and I've left the car for a few days and the car started with no problem.
                  a few DAYS in standby? Not possible unless you have two batteries. Which standby? S1, S2, or S3? I assume he means s1 standby. If you mean s3 standby maybe i could see it considering its about the same as hibernation.
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                  • #10
                    That's a good point. Mine is S1 (Windows XP default), but I've never tried S3 because I've never had to (see http://support.microsoft.com/default...BLN%5D;841858). Perhaps I will need to when winter rolls around. Instead, I simply use a USB hub powered off the OPUS 12V rail. The only USB device that remains on during S1 is my bluetooth dongle -- because it needs it's own USB host controller to avoid performance issues I connect it directly to the motherboard. I could probably last even longer if I did the registry mod to have XP suspend to S3.
                    But as I said before, there are many, many threads that discuss this...

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                    • #11
                      Oh -- and I have only one (small, stock) battery that came with my car. No second battery, no tank circuit. Something like 120 CCA, but I'm not sure offhand.

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                      • #12
                        i have my opus taking my computer into standby. i have a kill switch but i accidentally left it on when i went on vacation. 10 days in standby and my car still fired right up. probably wasn't great for the battery but i usually remember to hit the kill switch if i'm not gonna be driving for a few days. i'm using s3 standby...no usb devices are powered. only a light on the mb and the ram are still active.
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                        • #13
                          I, too, use the WinXP default standby option for my carputer and I've left it for as many as 5 days without startup problems. I still have my car's stock battery, too. I am pretty sure my GPS and a sound-activated LED are the only things that stay on because my other USB devices run through a powered USB hub.

                          Come to think of it, I should probably put the LEDs through the hub, too.
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                          • #14
                            Originally posted by Sonicxtacy02
                            a few DAYS in standby? Not possible unless you have two batteries. Which standby? S1, S2, or S3? I assume he means s1 standby. If you mean s3 standby maybe i could see it considering its about the same as hibernation.

                            S3, only the memory remains powered, everything else shutts down.
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                            • #15
                              its completely possible for the battery to last days with the pc on standby. i do it all the time. i think its the suspend function. the only thing required is for there to be enough power to keep the memory alive, which is minimal...

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