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Thread: Main battery recommendations

  1. #1
    Newbie
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    May 2004
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    Newnan GA, USA
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    battery recommendations

    Hello, been lurking here for a wile, excellent site, good info, did a search and did not find anything on this but maybe I did not know what to look for

    I am going to build a carputer in the near future I have no specifics yet except I am hoping to use a DC to DC power supply, taking DC source to AC and then back to DC for the carputer sounds inefficient to me as there are losses at each step but DC>DC does not allow for much of a drop in source voltage

    I am lucky that the victim auto can hold 2 full size batteries under the hood, I want to have one solely for starting, and one aux battery to safely provide power to the carputer & audio equip wile the engine if off and during crank.

    I understand that NiCadís have a flat discharge curve, in that the voltage does not start to drop off until the near the end of the batteryís charge, this sounds useful for a carputer where it is trying to regulate 12v from a 12v source, but as I understand NiCadís would not be appropriate in an auto environment, they should not be charged by constant voltage like a alternator puts out, have memory problems if not fully discharged, are expensive, ect ect

    Main question: Are there differences between the available lead acid batteries that would give one a higher percentage of itís AH at sufficient voltage to run a carputer? That would have a flatter discharge curve than other lead acid batteries?

    Right now I am looking at Hawker Odyssey 1200 or 1700, they are expensive but if they will do better at this task that would be ok with me. the other features of these batteries are nice but not really needed for this app, if not I will just use a quality liquid type deep cycle

    I am also trying to find out witch batteries have the best AH that will fit in my vehicle as this should allow for longer run times but I am having a hard time finding full specs for specific batteries, many companies just have marketing BS on their websites no real specifications

  2. #2
    Raw Wave Defiler's Avatar
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    Get an Optima Yellow top Battery.

    Nuff said...
    Aura MR62 (F and R)
    My Current MP3s
    IamDefiler.com

  3. #3
    Constant Bitrate
    Join Date
    Dec 2003
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    South West, FL
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    Quote Originally Posted by Defiler
    Get an Optima Yellow top Battery.

    Nuff said...
    just curious , what makes this battery so great ? I know nothing about batteries so i had to ask

  4. #4
    Registered User wyckyd's Avatar
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    Mar 2004
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    Tulsa, OK
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    If not optima then get a stinger 800 or 1000 battery (I think they are called power batteries or something like that). These are dry cell batteries. They hold up better in extremely cold and extremely hot conditions. They can be mounted in any way you want (even upside down) with no problems...ever. I have an 800 in my Blazer and have no electrical problems whatsoever. A friend has an 800 in front and 1000 in back with an isolator...no problems there either. He is always hitting 13.4v on his fuse block in the back whether the car is running or not. Just google for dry cell batteries and you will soon realize these are the way to go.

  5. #5
    Raw Wave Defiler's Avatar
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    This should explain a lot...

    http://www.optimabatteries.com/faq.asp
    Aura MR62 (F and R)
    My Current MP3s
    IamDefiler.com

  6. #6
    Low Bitrate
    Join Date
    May 2004
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    82
    what about odessey ? they are dry cell battery, you can mount it anywhere you want.

    only 14lb. i am thinking use it as a secondnary battery and located it in the trunk.

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