charging 12v dc battery with 24v dc charger.

Discussion in 'General Electronics Chat' started by t00t, Feb 23, 2015.

  1. t00t

    Thread Starter Member

    Jan 22, 2015
    55
    1
    hi , is it possible for me to charge a 12v dc battery with a 24v dv output ? will the battery burn ?

    thank you .
     
  2. #12

    Expert

    Nov 30, 2010
    16,252
    6,751
    Yes, if you regulate the voltage down to the right amount.
    If you just plug a 12 volt a battery into a 24 volt charger it will die in a matter of hours.
     
  3. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    Yes, the battery could be damaged.
    How many amp of the battery and the power supply?
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,741
    759
    well if you connect a 12V battery to a 24V source, something will definitely give out smoke and probably a bang too.
    You can charge if you use a proper charging circuit that can handle that input and your battery type
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    is it a charger with only transformer and rectifier, or electronic charger? the transformer kind can be dropped in ouput by varying the input voltage, the electronic kind cant. I have ussed 12 volt chargers to charge 8 volt batteries by using a light dimmer in the ac input to vary the output.
     
  6. t00t

    Thread Starter Member

    Jan 22, 2015
    55
    1
    Have a 3kva ups . And one of the battery is spoiled . Thus i am thinking of using just one 12v battery instead of the buying another one . Used to have two 12v connected in series . Its those 200ah batteries that are super heavy and expensive.
     
  7. #12

    Expert

    Nov 30, 2010
    16,252
    6,751
    No point in doing that. The UPS won't run on 12 volts if it's designed for 24 volts.
     
  8. t00t

    Thread Starter Member

    Jan 22, 2015
    55
    1
    Alrighty . Thanks guys. Seems like there is gonna be another huge hole in my wallet .
     
  9. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    In theory that is ok, but you have to using the same type and same maker.
     
  10. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,281
    1,232
    Yes, Scott is right. You might just as well buy 2 now as the other old one will soon die as they won't charge right.
     
  11. t00t

    Thread Starter Member

    Jan 22, 2015
    55
    1
    Yup. Well its gonna be a bigger hole now haha . Thanks guys .
     
  12. Brownout

    Well-Known Member

    Jan 10, 2012
    2,375
    998
    t00t,

    I've heard that often the batteries in an enterprise's UPS are changed long before they wear out, and are resold at bargain prices. If you put a little effort in a little effort, you might be able to find a set with lots of life in them. I think one of our members, Max Headroom, actually know something about this.
     
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