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Charging a lead/acid battery

Discussion in 'Power Electronics' started by kidthorazine, Jul 30, 2013.

  1. kidthorazine

    kidthorazine

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    0
    Jan 20, 2013
    I want to charge a 12v lead/acid battery using a wallwort. I have various wallworts with different voltages/milamps. I have a bunch of 12v ones with mAs ranging from 500ma to 2.5 amps. I also have a 15v 850ma one and an 18v 1000ma one. What would be best to go with?
     
  2. davenn

    davenn Moderator

    13,249
    1,746
    Sep 5, 2009
    that would depend on the rating of the battery .... what is it A/hr rating?

    Dave
     
  3. kidthorazine

    kidthorazine

    24
    0
    Jan 20, 2013
    Theres no way to know its sealed inside case. Its a car jump-start pak
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,174
    2,690
    Jan 21, 2010
    What does it weigh? A lead acid battery's weight is very closely correlated with its capacity.

    e.g. a 7Ah SLA battery is around 2.2kg. So you're looking at about 300g per Ah for a 12V battery. (that is confirmed by looking at an 18Ah battery and 38Ah battery.)

    Note that it is higher for deep cycle batteries (up to 350g/Ah) but it's still pretty close.
     
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