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Electronics In Car Entertainment (ICE), Sat-Nav, lighting, wiring etc.

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post #11 of 19 (permalink) Old 6th October 2007
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Interesting how a courtesy light will drain a battery so quickly...

When we go camping we run a couple of fluorescent strip lights, a little 12V TV and the air bed inflator from the car battery. I risked 3 days once without starting the car (a little silly perhaps) but everything was fine. I fitted a suitable battery from a diesel Megane (off the top of my head I can't remember the specs) which improved its cold starting abilities immensly, and i guess the heavier-duty nature of a diesel battery helps when using it as a "liesure battery"

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post #12 of 19 (permalink) Old 6th October 2007
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I hads a new battery fitted at a Renault dealers and the alternater checked for £45.00 2 years ago but mine is the petrol engine.

A problem well stated is a problem half solved !
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post #13 of 19 (permalink) Old 6th October 2007
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Originally Posted by lancer View Post
Thanks for the replies,
I donít think the carís battery has ever been allowed to run flat or the car has been idle for any length of time, the tow hitch has the two outlets I had just had a new 110 amp leisure battery fitted in the caravan when they put the motor mover on, could it be that this new battery was demanding more from the alternator than was going to the car battery? It seemed to be fully charged from the gauge in the caravan.
As you can see I am a newbie to caravanning still learning the ropes, I disconnected the electrics from the car as soon as I parked so I donít think anything in the caravan was draining the battery from the car.
But £90 for a battery Renault should be ashamed I did a quick trawl through the Internet and it seems the right battery (heavy duty) for the Laguna is around half that price and less.
The Renault mechanic said that even if you leave the curtsey lights on for a few minuets the battery will run flat, thatís not very helpful, I am starting to think the electrics where not very well planned if thatís the case.
Hi sounds like a load of old bull to me off the renault mechanic you could leave your curtisey lights on all night with a good battery and it will still start the car the next morning i would check the price of the battery again with renault because it sounds a bit steep to me i have found in the past the renault batteries to be good value for money and 3 years warranty on the ones i buy Gareth.
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post #14 of 19 (permalink) Old 7th October 2007
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Originally Posted by Normc3943 View Post
I have recently had Battery trouble with my Laguna. One day it would not start despite having used the car just an hour before. The RAC were excellent and confirmed the battery charge to be 11.5 volts. He checked the alternator which was charging ok then checked for any leakage of power but found none. He suggested a half hour run to put some charge in. Everything has been fine for about 2 weeks when the same thing happened again.
I thought I would make an enquiry about a new one and have had 3 quotations from leading suppliers.
a) £47
b) £74
c) £97
Can anyone tell me which option to take, all have 2 year guarantee. Is the cheapest one worth going for?

My Laguna 02 plate has had three batteries (including the original). The same symptoms - did not seem to hold charge. You would just come to it one day and it wouldn't start. The original battery and the first replacement were 'standard' 50Ah.

I've now fitted a 75Ah high power from Halfords. I needed it quickly and considering the delivery charge on the Internet it wasn't too much more (£99). It comes with a 4 year guarantee.

Although I have a petrol engine it's an IDE with high compression so I thought a high starting current (like a diesel) would help. It now sounds completely different starting.

In my case the car gets little use on a daily basis with short trips. I've also noticed that on idle the battery terminal voltage drops suggesting that the alternator does not supply much current at 780rpm.

Also note that the push button start will not engage even if the terminal voltage is high enough to drive the starter (10.5V).

The other thing is the sheer number of auxilary circuits. Just unlocking and placing the card in the auxilary position switches on all interior lights, the sat nav, climate control amongst others. I bet the battery drain is close to 10 amps like this.

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post #15 of 19 (permalink) Old 7th October 2007
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Maybe the Renault mechanic was referring to all the curtesy lights which can be up to twelve (roof lights, footwell lights, door lights, etc) 5 watt bulbs on some models. I have seen this happening during valeting where all doors and boot lid can be open for extended periods of time.
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