Silly electrical question
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New User
Joined: Aug 2005
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Silly electrical question
OK--a buddy needs a jump for his dead battery--I hop in the F-250 to head over when I start thinking about the dual batteries under my hood. I'm worried that I might fry something (in his car or my truck)--so I take my gasser instead. Any reason for my worries? And why do we have 2 batteries anyway?
Sorry, in advance, for the newbie question!
Sorry, in advance, for the newbie question!
Freshman User
Joined: Jun 2005
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From: Jacksonville, Fl
I understand they are for cranking amps. But, if you're going to jump a car with a single battery, would the connections be the same? And would the second battery in the truck create a problem for the car being jumped?
Postmaster
Joined: Jan 2003
Posts: 4,417
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From: Durham, NC
No, the batteries are wired in parallel, so the voltage is still 12V, and it won't harm the vehicle being jump started. Wiring batteries in parallel increases current, wiring in series increases voltage. The connections will be the same.
Last edited by Bob Ayers; Sep 3, 2005 at 07:13 AM.
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I figured the batteries were in parallel--thanks. Otherwise it would be a 24V system, right? I was mostly concerned about the additional current available from the 2 batteries and whether that would create any sort of overload on the car being jumped? I assume it would be regulated somehow--so chances of causing any computer problems, for example, would be slim. But what about the battery itself being overloaded by a jump from the two in my truck? I know I'm being way too **** about this--but now it's curiosity! Thanks for the bandwidth guys.
Elder User
Joined: Mar 2005
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From: New Jersey
The extra current is actually helpful. You might be a little **** about this but that's actually a good thing. I would rather see people seek knowledge and exercise caution than assume they know everything and just throw caution to the wind! Be thankful that you have a place to go to that has so many knowledgeable people to assist you. 
Postmaster
Joined: Jan 2003
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From: Durham, NC
Originally Posted by VADean
I figured the batteries were in parallel--thanks. Otherwise it would be a 24V system, right? I was mostly concerned about the additional current available from the 2 batteries and whether that would create any sort of overload on the car being jumped? I assume it would be regulated somehow--so chances of causing any computer problems, for example, would be slim. But what about the battery itself being overloaded by a jump from the two in my truck? I know I'm being way too **** about this--but now it's curiosity! Thanks for the bandwidth guys.
in the vehicle being jumped. This is called "ohm's law", current = voltage/resistance (I=E/R).
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Elder User
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sexual wording removed
One word of caution, if you ever run into a woman with electrical problems, never tell her "EDITED", you'll probably regret it! 
Last edited by captchas; Sep 3, 2005 at 02:30 PM. Reason: sexual wording
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