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Thread: Best Battery for Discovery

  1. 10th April 2011, 07:30 PM #11
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    drivesafe
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    Quote Originally Posted by chuck View Post
    If you had to jump start using your main battery off the yellow top what leads do you use again?
    Hi Chuck, because your auxiliary battery is earthed to the earth stud in the auxiliary battery compartment and as the negative cable that comes with the kit is already thick enough, you only need to use a single jumper lead, connected to the positive terminals of both batteries and you can the start the motor.

    PS, thanks to all for the thumbs up.

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  2. 5th May 2011, 06:28 AM #12
    gasman
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    Please one more time for the dummies!

    You are saying I can jump start MY vehicle from the aux battery if the cranker fails? and by only using the positive lead?

    Whilst on the subject, I have 2 crankers but would have preffered a deep cycle. Does mean I have to be careful with the aux battery when running accessories off it?

    Thanks
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  3. 5th May 2011, 09:36 PM #13
    ADMIRAL
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    Yes. Make a small jumper lead up. As the batteries are commonly earthed, a jumper lead from your positive to positive will do the trick.

    Tim will probably have a different opinion, but I have found that using cranking batteries as aux, works fine. It is generally cheaper, and as the batteries are of the same type, ( primary and aux ) they seem to charge up better. Comments anyone ?
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  4. 5th May 2011, 09:49 PM #14
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    drivesafe
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    Quote Originally Posted by ADMIRAL View Post
    Tim will probably have a different opinion, but I have found that using cranking batteries as aux, works fine. It is generally cheaper, and as the batteries are of the same type, ( primary and aux ) they seem to charge up better. Comments anyone ?
    I agree, cranking batteries are just as good as deep cycle batteries but have one drawback, do not discharge them below 50%.

    Deep cycle batteries can better handle lower discharges but, as you posted ADMIRAL, cranking batteries are cheaper.

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