Deep Cycle Battery as Cranking Battery





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  1. #1
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    Default Deep Cycle Battery as Cranking Battery

    Is it possible? Has anyone done this? Why need a dual battery setup if it's possible?
    Sorry, novice here, just wondering...

  2. #2
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    Default Re: Deep Cycle Battery as Cranking Battery

    In contrast, starter batteries deliver short, high-current bursts to crank an engine, meaning they frequently discharge only a small part of their capacity. Deep cycle discharges slower, and smaller parts of their capacity. Deep cycle batteries, are not designed to give short surges all the time. The main difference between true deep cycle batteries and other types is that deep cycle batteries have solid – not sponge – lead plates
    Last edited by Bostokkelos; 2019/12/02 at 04:40 PM.

  3. #3
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    Default Re: Deep Cycle Battery as Cranking Battery

    Normally the crank amps are given for a specific battery, if high enough it will start your vehicle. But a true deep cycle will probably not, but the semi deep cycles may.
    Last edited by JLK; 2019/12/02 at 06:12 PM.
    Johan Kriel

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  4. #4
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    Default Re: Deep Cycle Battery as Cranking Battery

    If you want to go that route go for a high cycle battery
    1998 Daihatsu Rocky 'The Kitty'
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  5. #5
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    Default Re: Deep Cycle Battery as Cranking Battery

    As I understand it.

    If you use a real deep cycle battery to start the engine, the big lead plates will get hot and warp, destroying the battery in no time.

  6. #6
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    Default Re: Deep Cycle Battery as Cranking Battery

    I have tried to start my Hilux 3.0 D4D with a new, fully charged 105Ah deep cycle. It simply does not deliver the required CCA (Cold Cranking Amps) required by the starter.
    So stick with a 'normal' battery as per your vehicle specs. Unfortunately, no free lunches in this department...

    Hilux 3.0 D4D "Goldilocks" - Rigged for overlanding
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  7. #7
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    Default Re: Deep Cycle Battery as Cranking Battery

    How about the Blue Nova Lithium batteries (108Ah)?

    Is anyone out there using these batteries as dual battery solution?
    Please shed some light. I know they are expensive.
    But how do they perform? How to charge? Can normal NL or SM battery box work with these batteries?

  8. #8
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Teryos View Post

    ....about the Blue Nova Lithium batteries (108Ah)?

    But how do they perform? How to charge?
    Comments on the 108Ah:

    Remember this 108Ah Lithium almost equals 2 x 105Ah Lead acids....

    - The product is not really for cranking/starting applications, but
    - can handle up to 160A discharge for 30sec cycles, so it will start most cars
    - If your alternator supplies enough current at 14.2V it can work in the starter battery bay.
    - I would not use it as a cranking battery - personal opinion

    - Charging current available must preferentially be 0.2C or more (or 20A minimum in the case of the 108Ah)
    - Charging must be constant voltage supply at 14.2 Volts or more, preferably 14.4 Volts
    - So most older "intelligent" chargers that go over to trickle/float by itself will not work
    - A simple 220V 300W adjustable to 14.4V power supply will charge very well
    - Solar PWM or MPPT Chargers MUST have a Lithium selection option - or 14.4V fixed voltage option
    - DC-DC chargers also same

    BUT there is a current trick:
    if you install 2 HcdP 12A DC-DC 14.2V constant voltage chargers in parallel you are just about sorted, (DC-DC) and solar.
    https://www.hcdpelectronics.co.za/in...&product_id=24


    Better still:
    Wait until about March then Manie from HcdP will have the demand season pressure off him and will make available 20A stand alone chargers from the platform used in his latest fancy Panels
    Last edited by Dungbeetle; 2019/12/05 at 04:02 PM.
    2000 Patrol GU 4.2D(onkey) beyond 840 000 km

  9. #9
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    Default Re: Deep Cycle Battery as Cranking Battery

    What about these batteries?

    https://www.takealot.com/varta-792s-...E&gclsrc=aw.ds

    Anyone?

  10. #10
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Teryos View Post
    What about these batteries?

    https://www.takealot.com/varta-792s-...E&gclsrc=aw.ds

    Anyone?
    It's a dual purpose, not a true deep cycle.

    BUT it is a pretty good Lead Acid battery....for general camping requirements it's OK - will also work as a cranking battery.

    and - I would not buy batteries from Takealot, buy directly from a know supplier, but that is just me.
    Last edited by Dungbeetle; 2019/12/05 at 03:59 PM.
    2000 Patrol GU 4.2D(onkey) beyond 840 000 km

  11. #11
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Dungbeetle View Post
    It's a dual purpose, not a true deep cycle.

    BUT it is a pretty good Lead Acid battery....for general camping requirements it's OK - will also work as a cranking battery.

    and - I would not buy batteries from Takealot, buy directly from a know supplier, but that is just me.
    Me too, the date stamp matters I believe.

    For how long can a 56lt Snomaster (mimimal temp to keep meat not rotting) be run with one of these at a campsite (max two three days)?

  12. #12
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Teryos View Post
    Me too, the date stamp matters I believe.

    For how long can a 56lt Snomaster (mimimal temp to keep meat not rotting) be run with one of these at a campsite (max two three days)?
    I assume with no charging available

    I you really really have to stretch the battery to its limits...and believe averages:

    In high summer:

    That Snomaster will draw on average 3Amps
    The battery can handle max 80Ah drawdown

    Thus 80/3=26 hours and that is really really pushing it

    In mid winter - totally different - you could end up using average 1.7A

    80/1.7=48Hours - now this is really really optimistic.
    Last edited by Dungbeetle; 2019/12/05 at 04:13 PM.
    2000 Patrol GU 4.2D(onkey) beyond 840 000 km

  13. #13
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Dungbeetle View Post
    I assume with no charging available

    I you really really have to stretch the battery to its limits...and believe averages:

    In high summer:

    That Snomaster will draw on average 3Amps
    The battery can handle max 80Ah drawdown

    Thus 80/3=26 hours and that is really really pushing it
    Thanks. Do they charge as fast as normal cranking battery though?

  14. #14
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    Default Re: Deep Cycle Battery as Cranking Battery

    Quote Originally Posted by Teryos View Post
    Thanks. Do they charge as fast as normal cranking battery though?
    Very little difference, except if you ran them completely flat. Smallish chargers will struggle to get it going. Car alternators will have no issue.

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