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Thread: 2nd Battery

  1. #11
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    Sonicxtacy02's Avatar
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    i dont have any pictures yet as my wires are in a big ball of mess still right now.. i'll tidy it up this weekend and post though.

    wiring the stinger was a snap though, run one wire from the main battery to it, one wire from it to new battery, a small ground and a small remote turn on wire and i was all set. i used 4 gauge for the power wires and fused it to 80 amps. i DID still manage to run my main battery low one day after several hours of leaving the car on but that was probably because i wired the remote to a NON-ignition wire, meaning the stinger's relay was triggered even though the car wasnt running, only in the first key position.
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  2. #12
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    i've got a


    and a yellow top optima

    works spot on
    2001 Passat 130TDi Sport - Via Epia 15000, 1gb, 100gb, 220w psu, 7" lilliput motorized touch (chopped and in dash as a fixed), bluetooth, bu-303 gps, 7 port usb hub, tiny keyboard, netgear 54mb wifi, optima yellow top, ryder rt1170x, freecom dvb

  3. #13
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    Quote Originally Posted by Serfio View Post
    but with the diagram abowe if the tank battery is drained out i can't start the carpc also if the engin is running..isn't so?

    do I need another switch to power the carpc from 2nd battery ONLY when the engin is off and when the engin is running switch back to main battery?

    Can you post me a diagram? I'm not an electronic..

    Thanks
    this is my $2 setup, fuses near car, pc batteries and PSU not shown. the PC battery is disconnected from car battery when you turn car off (ACC off), and during engine cranking (some cars may not disconnect during cranking).
    Code:
                      +------+
              ACC ----| coil |----- GND
                   85 +------+ 86    
                                                  +------+
     Car Battery ----+      +-----------------+---| PSU  | 
                  30  \    87                 |   +------+
                       \                      |
                                             PC
                                           battery

  4. #14
    Low Bitrate ilyassx's Avatar
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    Check this thread Battery Recommendations?
    The old setup http://flickr.com/photos/ilyassx
    The new setup http://my.opera.com/ilyassx/albums/show.dml?id=110701
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  5. #15
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    Quote Originally Posted by ming View Post
    this is my $2 setup, fuses near car, pc batteries and PSU not shown. the PC battery is disconnected from car battery when you turn car off (ACC off), and during engine cranking (some cars may not disconnect during cranking).
    Code:
                      +------+
              ACC ----| coil |----- GND
                   85 +------+ 86    
                                                  +------+
     Car Battery ----+      +-----------------+---| PSU  | 
                  30  \    87                 |   +------+
                       \                      |
                                             PC
                                           battery
    I cannot understand the meant of these numbers
    85=?
    86=?
    87=?
    30=?

    Can you (or somebody) explain me What they means?

    Thanks

  6. #16
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    those are the terminals on the standard 5 pin relay... look at one & you'll see

  7. #17
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    ouch! ...thanks, I'm really a noob

  8. #18
    Low Bitrate romanman69's Avatar
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    Quote Originally Posted by Pandaman72 View Post
    I have pretty much the same thing, sorta like this -





    Works a treat, I can leave the carputer running when I just slip into the corner shop etc, and even if I forget it is on, it will not kill the cars battery.

    Panda


    What is the purpose of the diode?

  9. #19
    Variable Bitrate P3D4T0R's Avatar
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    The purpose of the diode is to keep the secondary battery from discharging into your cars battery or accessories. Iv been doing some research on powering my PC this way and I only have two unanswered questions left;
    one: Will these work?
    http://www.allelectronics.com/cgi-bi...gi?item=GC-217
    http://www.allelectronics.com/cgi-bi...?item=1N1190AR
    two: Will this setup help regulate the power (i.e. keep it around 12v both during crank and normal operation)?
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  10. #20
    Low Bitrate Pandaman72's Avatar
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    Quote Originally Posted by romanman69 View Post
    What is the purpose of the diode?
    What P3D4T0R said, it stops the backup battery powering the car.

    Panda
    Car - Ford Falcon XR6 Turbo, footwell lights, Pioneer front speakers
    Carputer- P3 966MHz, 256MB RAM, 200GB HDD, 300W PSU

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