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12vDC Isolator

Discussion in 'General Electronics Discussion' started by MarkT, Jul 2, 2013.

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  1. MarkT


    Jul 2, 2013
    I am trying to build a unit that will charge two batteries without allowing one to be discharged by the other. I want the accessories in my vehicle to run off a "new" auxiliary battery. What I don't what is the "new" battery to discharge the "start" battery for the engine. Can anyone help?
  2. john monks

    john monks

    Mar 9, 2012
    Last edited: Jul 2, 2013
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