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Thread: Use laptop battery for power sometimes? (Don't know how to ask this better...)

  1. #1
    The Lavender Tie Just
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    Use laptop battery for power sometimes? (Don't know how to ask this better...)

    I was wondering,

    Would there be any way that if a person who uses a laptop as their carputer could (when their car is shut off) tell the laptop to go to Hibernate and not use up the car battery, but it's own battery instead?

    What I'm thinking of is using this tablet pc:
    http://www.xploretech.com/public/iX104C2V%20Spec.pdf

    It can have up to a 5 day, suspend life (With the optional 4 cell battery). But, if you think about it, the max that would be needed, would be maybe 12-15hrs. So, once the car starts up again, it charges up the battery.

    One wouldn't necesarily need the extended battery, the stock one gives 3 days standby.

    I'm not sure if I explained myself well, but hopefully someone out there can decifer what I'm trying to say.

    Peace,

    Rafster

  2. #2
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    What I did is set my computer to hibernate after 1 minute of inactivity while running on battery. I then bought a power adapter that plugs into the cigarrette adapter in the back, like this one: http://www.compusa.com/products/prod...13121&pfp=cat3
    This way as soon as I shut off the engine, the power from the accessory jack gets shut off. The computer switches to battery power, then gives it another 1 minutes running off the battery before it hibernates automatically. Since I drive my car every day, I never have to worry about the battery dying while its in hibernate mode, because it charges as soon as I turn the key.

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    Phillie Escalade182's Avatar
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    neat idea, I wish I could help.

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    Low Bitrate Goofus's Avatar
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    Does it wake from hibernate when you turn the key back on, or do you have to hit the power button?

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    The Lavender Tie Just
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    Quote Originally Posted by Goofus
    Does it wake from hibernate when you turn the key back on, or do you have to hit the power button?
    I don't know, I don't have it yet.

    Peace,

    Rafster

  6. #6
    Maximum Bitrate zPilott's Avatar
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    I have my laptop based carPC hooked up to ACC power. Unfortunately, (among the 4 laptops I checked) none of those laptops could resume on receiving power.

    I was hoping I could have it suspend with the lid closed, and resume with it open (and hack the switch to make that work) but it only works if the laptop is continuously powered externally. I can't really go that route though, since I don't use my car regularly (I work from home, or away in another state, so I do drive that much).

    I ended up hacking the power switch by installing a relay that "pushes" the power button when the car turns on. You can find plenty of info on that.

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

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    The Lavender Tie Just
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    Quote Originally Posted by zPilott
    I have my laptop based carPC hooked up to ACC power. Unfortunately, (among the 4 laptops I checked) none of those laptops could resume on receiving power.

    I was hoping I could have it suspend with the lid closed, and resume with it open (and hack the switch to make that work) but it only works if the laptop is continuously powered externally. I can't really go that route though, since I don't use my car regularly (I work from home, or away in another state, so I do drive that much).

    I ended up hacking the power switch by installing a relay that "pushes" the power button when the car turns on. You can find plenty of info on that.
    I was thinking about what you just wrote...

    Would a solar panel work for this kind of project? Would it be able to keep that laptop charged at all times and actually not have to worry about plugging it in to the car's battery?

    Peace,

    Rafster

  8. #8
    Maximum Bitrate zPilott's Avatar
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    Other people would know better, but I think that it isn't a viable solution (solar panels just don't put out enough juice).

    Solar Panel to power carputer??

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

  9. #9
    The Lavender Tie Just
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    Quote Originally Posted by zPilott
    Other people would know better, but I think that it isn't a viable solution (solar panels just don't put out enough juice).

    Solar Panel to power carputer??
    Well, the link above is speaking of desktop machines not laptops. I know for a fact that laptops with Mobile processors take up less power than the M10000 type board.

    Peace,

    Rafster

  10. #10
    Maximum Bitrate zPilott's Avatar
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    what is the wattage of your laptop power supply? way over what a solar panel would put out I am sure.

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

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