battery charger output

Discussion in 'General Electronics Chat' started by brian3222, Jul 29, 2013.

  1. brian3222

    Thread Starter New Member

    Jul 29, 2013
    1
    0
    What kind of voltage should a battery charger put out when you test it at the clips with a volt meter?

    at 12v/10 amps I get around 10.5 volts

    at 12v/2 amps I get around 9.5 volts

    Not on the battery, just hooking the clips to a VM.

    Thanks
     
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    611
    120
    What sort of battery are you charging?

    A 12V sealed lead acid battery for example will require something around 13.7V.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,526
    2,369
    You may get all kinds of misleading readings without a battery connected, depending on the technology used, the one I built some time ago requires to see a battery voltage/load before you see any reading.
    Max.
     
    Last edited: Jul 29, 2013
  4. wayneh

    Expert

    Sep 9, 2010
    12,103
    3,038
    The unloaded readings don't mean anything. Try attaching a lightbulb or attaching to a battery. You should get ~14V
     
  5. janu

    New Member

    Mar 1, 2013
    9
    0
    Dear Sir/Mam.,
    We are using the LTC2941 IC for the Li-ion battery level indication(3.6v) and also use the charging IC(LTC4057)with AT32UC3A3 controller.

    Just now i made the hardware connection based on this.

    Then i need to connect the LED for the battery level charging and discharging based on percentage.
    How can i made the code for the above concept.

    Please clarify this as earlier...
     
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