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You mention "A big wallop in one go", surely this goes for the battery that is fitted to the car also.

That battery is constantly getting "A big wallops"

Just a thought

OK, lots of views/opinions but I still have not got a YES or NO if connecting the cars battery to the SPARE leisure battery via jump leads is OK.

I must add this will only be done in an emergency if the spare has gone down in voltage and needed a bit more pwer put back in.

The connect to the car would be no longer than for about 30/45 minutes.

I have since had the electrics upgraded to twin sockets (for charging leisure battery and fridge operation whilst towing)

In addition to this I also had two further connections added into the boot to connect my spare leisure battery to charge whilst driving.

My only slight concern is that the wires seem pretty standard gauge similar to the wires on my CTEK 5.0 charger, is this the standard sort of wire used to connect to charge battery's?

Quote: Originally posted by Miserly on 30/7/2011

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No,not really,leisure batteries are designed for lower current use,a car battery has much thicker plates.

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Quote: Originally posted by davek0974 on 10/8/2011

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I presume it was a professional conversion?

The charging wires (green/white) will only take around 3-4A so not too heavy, the fridge (red) wire is usually much heavier as is the fridge earth wire (black).

If it was a pro upgrade then you should not need to worry, just enjoy

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Yes, it was a tow bar fitter, the guy that fitted my towbar originally.

I should think all is in order