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Quick 12v question

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by alpesh26, Jun 27, 2012.

  1. alpesh26
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    alpesh26 Member

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    [Jun 27, 2012]
    Ive just Picked up a new phone charger which sits nice and flush inside the cigarette lighter socket. I'd prefer to leave this in rather than the cig lighter because I don't smoke. Will the charger use any battery power if there is nothing connected to it? It has no light on it but with the cig lighter socket being a permanent live I don't want to wake up to a flat battery. The new charger just has 2 USB sockets on it

    Tia
    #1
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  3. Ste_Nova
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    Ste_Nova Active Member

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    [Jun 27, 2012]
    i've got 2 with lights in mine, no issues even after a full weekend of not using car
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  4. bizzab7
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    bizzab7 Member

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    [Jun 27, 2012]
    hi there no it wont drain your battery.your ignition has to be on for the power to reach the contacts of whatever you have plugged in
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  5. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jun 28, 2012]
    Even if its live, it will only potentially power 1-2 led's that run at such a low rating it shouldnt be an issue.
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  6. alpesh26
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    alpesh26 Member

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    [Jun 28, 2012]
    Cheers guys. Think I'll just leave it in
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  7. PetrolDave
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    PetrolDave Well-Known Member

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    [Jun 28, 2012]
    Not true, the "cigarette lighter" is permanently live on the B6 and B7.
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  8. VagCabby
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    VagCabby Member

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    [Jun 28, 2012]
    I have mine in 24/7 with no battery issues attal
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  9. bizzab7
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    bizzab7 Member

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    [Jun 28, 2012]
    Thats new news to me.i was under the impression that it was only a seperate 12v supply that was always live but maybe im wrong lol
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  10. alpesh26
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    alpesh26 Member

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    [Jun 28, 2012]
    Hmm, I just plugged in my iPhone into the USB sockets and it started to charge and the keys were no where near the ignition.

    Would I be right in saying if nothing is plugged into the USB sockets then there is nothing to draw power (apart from a little to keep the plug powered up)?
    #9
  11. bizzab7
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    bizzab7 Member

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    [Jun 29, 2012]
    even if it was on all the time it wouldnt drain your battery as the amount of ampage used will only be little
    #10

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