Trying to convert 6v batteries to 12v

Discussion in 'The Projects Forum' started by CK07, May 16, 2009.

  1. CK07

    Thread Starter New Member

    May 16, 2009
    2
    0
    I have 2 car lights that are supposed to run off a 12v battery, but i'm cheap and really don't want to buy one. I was wondering if it was possible to jimmy rig some 6v batteries together to get that output. I left my electric knowledge back in high school. Thanks for reading!
     
  2. Mike2545

    Active Member

    Mar 26, 2009
    116
    3
    Two 6 volt batteries in series will give you 12 volts.
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    A small 12V lead acid battery is very cheap (about 10$).

    If you want to use the 6V batteries you have connect them in series and you will get 12V. To connect them in series connect the positive side of the first to the negative side of the second and take the 12V from the two unconnected terminals.
     
  4. CK07

    Thread Starter New Member

    May 16, 2009
    2
    0
    Thanks guys, I actually figured it out when I was waiting, haha. But I really appreciate your guys' help. One more thing tho, I couldn't find a 12v for that cheap... what's the down side of using 2 6v batteries?
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    They take more space.
    Not a very neat work.
    You will need to charge both.
    If they are not identical they will discharge at different rates.
    You increase the series resistance of the circuit because the internal resistance of the batteries adds (in series).
     
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