Battery discharge after charging.

Discussion in 'General Electronics Chat' started by williamj, Apr 4, 2013.

  1. williamj

    Thread Starter Active Member

    Sep 3, 2009
    180
    32
    This has probably been asked before but I can't seem to find it. After charging a battery (any rechargeable battery), if the battery is left connected to the charger and the charger is turned off or unplugged will the battery discharge. Logic dictates' that if a battery is connected to a circuit ( battery charger's secondary coil) current will flow. If current flows battery discharges.

    Is there built in circuitry to prevent battery discharge? This is just a question that's been pokin' me in the back of my head for some time now and I just thought I'd ask.

    thanks,
    williamj
     
  2. #12

    Expert

    Nov 30, 2010
    16,316
    6,818
    It depends.
    A simple charger will only have rectifiers facing the battery. They won't back flow. Modern chargers? You can't tell unless you measure them.
     
    williamj likes this.
  3. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    And most battery types will self discharge when not connected to any load - just sitting there.
     
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  4. williamj

    Thread Starter Active Member

    Sep 3, 2009
    180
    32
    Thanks for the replies. Just one of those questions that seem to nag after you forever. LOL

    Thanks again,
    williamj
     
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