RLaguna First time posting :D - Renault Forums :: Independent Renault forum

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

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post #1 of 14 (permalink) Old 22nd October 2006 Thread Starter
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RLaguna First time posting :D

First posting here, so it would be unfair for me to mark an option without airing my problem

I registered before i had a problem tbh, and this morning i found that when i went to unlock the car (using the remote plip'er type key thingie) i didn't get my indicator flash nor the sound of locks unlocking...so i inittially had two thoughts.
One) the battery is dead in my remote (range has been diminishing somewhat over the last few months, but i went out for a ride last night, and range was a good solid 10ft everytime)... so i thought it must be
Two) The car battery is dead.

I unlocked manually, and tried to start the car and nothing.
Anyways, i just bought a battery charger and connected the battery, but it apparantly has 50% charge in the battery.

I'm assuming that isn't enough?
With the fans and lights off, the Aux panel lights up, and the fuel guage flickers...but that's as far as it gets.

I'll leave the battery on trickle til tomorrow and connect it up there, but it just seems odd that i went out last night and today it won't start. (Odd in the sense i didn't leave a light/radio/anything on that could drain the battery).

I'm hoping this will be one part of the problem rectified, i say one part, because of course when you disconnect the battery for some time, you then have to input the radio code which i don't have.

If it's not one thing...... [sigh]

Anyways, thanks for reading to the end
And thanks in advance
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post #2 of 14 (permalink) Old 22nd October 2006
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welcome warden. i have copied your post into the electronics forum to enable the members here to assist if they can.
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post #3 of 14 (permalink) Old 22nd October 2006
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Hi Warden, the battery died in one of my prior Renaults in just the same way, in fact quicker I'd finished a journey of around 200 miles with no problems whatsoever I then stopped for a rest and a bite to eat. BTW this was in the middle of the summer maybe an hour or so later I went back to the car and turned the key and got nothing it was dead. The AA came and jump started the car this guy told me of a place from where I'd get a new battery about 10 miles away and suggested I should follow him, it was on his way back. When we got there I stopped the car and tried to start it again, nothing the same, it was dead. The battery was OME about 8 years old so I couldn't complain.
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post #4 of 14 (permalink) Old 22nd October 2006
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Most battery gauges are pretty much useless. I wouldn't trust the 50% reading for a minute, and I wouldn't be surprised if it means that the battery's nearly dead. As far as I'm aware, there are only two reliable ways of measuring the charge of a battery:

1) Measure the specific gravity of the electrolyte (you can buy a gizmo to do this from Halfords, though take care with the battery acid. Obviously this won't work with a sealed type battery.)
2) Perform a voltage test under load. Generally this is a big pair of metal probes with some heavy duty resistance wire and a voltmeter across them. The resistance wire puts a significant load across the battery, while the meter gives you a voltage.

Without load, a practically flat battery can give more or less the same voltage as a fully charged one. The figure is meaningless.
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post #5 of 14 (permalink) Old 22nd October 2006
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hello &Welcome
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