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Topic: Swap battery while running? (Read 486 times) |
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Moonchalk
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2.3 Facelift Ultima Born: Jan 98 Restored: 2023
Posts: 165
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Swap battery while running?
« on: Nov 9th, 2008, 2:03pm » |
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Would it be ok to swap a battery in a Scorp while the car is running in order to charge a totally flat spare battery?
Have done this on others cars in past without problem, but understand Scorp elecs might be more sensitive.
Thanks
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scorpio_man
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Ford Kuga awd
Posts: 5654
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Re: Swap battery while running?
« Reply #1 on: Nov 9th, 2008, 2:53pm » |
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DON'T EVEN THINK ABOUT!!!! 
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Moonchalk
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2.3 Facelift Ultima Born: Jan 98 Restored: 2023
Posts: 165
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Re: Swap battery while running?
« Reply #2 on: Nov 9th, 2008, 4:03pm » |
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hehe
thought that might be the answer
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Moonchalk
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2.3 Facelift Ultima Born: Jan 98 Restored: 2023
Posts: 165
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Re: Swap battery while running?
« Reply #3 on: Nov 9th, 2008, 4:06pm » |
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While were on the subject, are jump leads ok to use on a Scorp or is using an external charger the only option?
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
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Re: Swap battery while running?
« Reply #5 on: Nov 9th, 2008, 5:50pm » |
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No, I wouldn't do it either 
Comparable to installing extra memory in your computer while it was powered up.
Big no no...
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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tlundkvi
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Ex. Scorpio 2.9 24V -95
Posts: 909
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Re: Swap battery while running?
« Reply #6 on: Nov 9th, 2008, 6:48pm » |
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Have heard, that runing the car on a flat battery (connected) alone, will blow the alternator rectifier circuit within minutes because of the overload. Jump leads to another battery is the same, you have equally many amperes to fill.
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harry.m1byt
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What's YaBB?
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Re: Swap battery while running?
« Reply #7 on: Nov 9th, 2008, 8:31pm » |
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Unless there is already something seriously wrong with the alternator, connecting a flat battery to it should do no harm. Connect the flat battery via jumper leads to the good battery in the car, start it up run it for good while and then swap the batteries over with the engine stopped.
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August '95 2.9 12v auto Ultima -
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Moonchalk
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2.3 Facelift Ultima Born: Jan 98 Restored: 2023
Posts: 165
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Re: Swap battery while running?
« Reply #8 on: Nov 9th, 2008, 11:03pm » |
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Could I do the opposite of this, e.g.
Jump the car from a strong external battery having previously swapped the flat one into the car with the engine off?
Thinking that I could then leave engine running and take car for a short run to give the flat some decent charge.
That shouldn't do any harm should it?
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Highlander
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Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
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Re: Swap battery while running?
« Reply #9 on: Nov 9th, 2008, 11:12pm » |
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I think that'll be the normal situation when jump leads get used so no it wont do any harm
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on Oct 17th, 2011, 12:35pm, Simmo wrote:I give up !  Too much for an old boy!  |
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matt1987
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I'm a YaBB newbie!
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Re: Swap battery while running?
« Reply #10 on: Nov 10th, 2008, 9:44pm » |
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go and buy a battery charger for 30 quid and you will use it again and again
if the scorp electics or alternator go it going to be alot more expensive and a alternator new is over 100notes
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