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Jump starting vehicle with 2 batterys.

  

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Topic starter

I just got an 06 F250 with a 6.0 powerstroke diesel. Apparently this cold blast we're having in Chicago has mad it necessary for me to jump start this beast. Should I hook up the jumper leads to one battery in preference over another? Thanks.


3 Answers
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I would just get a jump starter with a battery thats rechargeable that comes as a combo like this https://www.amazon.com/TACKLIFE-T8-18000mAh-Starter-Charging/dp/B085HCWD8T/ref=sr_1_5?dchild=1&keywords=jump+starters&qid=1613355429&sr=8-5

I have one like that you can charge up like that that's an all in one and it works great and you might as well have it in case you get a dead battery just remember to keep it charged up every few months. 


Not what I asked. SMH


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the weaker one


What if you can't determine if there's a weaker one?


then it probably doesn't matter. Try both if you need to.


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What are you trying to do exactly?   I don’t understand the question.  If it’s another vehicle jump starting, here’s the order:   See at 4:19  If I misunderstood, please help me understand.

https://m.youtube.com/watch?v=9iVwCq9FxSc


It sounds like the situation is he drives a diesel. Diesel trucks use two 12V batteries in series, for a total of 24V (it takes more power to start a high compression engine). The car he's boosting from, has a 12V gas engine. So he's asking which of his two batteries should he put the booster cables on.


Thank you for clarifying. Got it!


@mountainmanjoe If 2 batteries are needed in a diesel to accommodate the higher cranking amps, shouldn’t they be in parallel? A parallel connection increases the current rating but keeps the voltage the same. If you also needed higher voltage you would put in series., but I thought for diesel you wanted more
current draw capability from the battery.


Power is a product of voltage and current ( P = V x I )
When you increase current, you have to increase the size of the cables, and copper is expensive. By instead doubling the voltage, you can double the power without needing thicker cables. (This is why Europe can use thinner wires in 220V household wiring).

Power tools ... more powerful tools have higher voltages.

 

Anyway, some diesel vehicles just have 24V systems. Landcruisers for example.

 

 

But maybe I'm being presumptuous.

@cgobear69
Do you have a 12V or 24V system. Series or parallel.
If the batteries are connected in parallel, then it absolutely doesn't matter where you put your booster cables.


Thank you.


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