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Battery going flat

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Old Nov 21, 2009 | 03:04 AM
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Default Battery going flat

The car had been left on the drive for 3 days (we've had a lot of rain and bad weather).

For some strange reason the car would not start so i had to use jump leads (did a 25minute trip to the Gym, car sat in carpark for an hour, then a 40minute journey back home) - now i did have my radio on, lights, and Aircon on (most of the time).

This morning the same thing, i would have thought it would be okay till the morning after (and retained enough juice)?

I presume something must be draining it, but the car has been fine since the bad weather. The battery is a brand new Honda one approx 9 month old.

Any ideas?

Or is it me being a tard as it needs to be driven for a longer period of time without the above items on?

Thanks
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Old Nov 21, 2009 | 03:14 AM
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Alternator?
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Old Nov 21, 2009 | 03:20 AM
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Could be Mark funnily enough, my mate had a problem with his alternator in his Focus ST when we were travelling back from leeds from a night out a few weeks ago.

I asked the AA guy and he said, If the alternator is failing or has failed it will draw all power from the battery very quickly.

In my mates case it had faulted and drew so much current the car was a heavy lump.

Weather here is turning really shite AGAIN or id have a look at the belt, current etc.
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Old Nov 21, 2009 | 04:27 AM
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Hmmm not the alternator the voltage is fine with car on/off.
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Old Nov 21, 2009 | 04:31 AM
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Check for current drain, just remember to use your ammeter in series with the battery, not parallel
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Old Nov 21, 2009 | 04:33 AM
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Originally Posted by loftust,Nov 21 2009, 02:31 PM
Check for current drain, just remember to use your ammeter in series with the battery, not parallel
Just done that Matt, the alternator is fine judging by the values i got back from my fluke.
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Old Nov 21, 2009 | 04:42 AM
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Or the battery might just have come to the end of it's life. This happens every year on here. Just replaced mine and I know lucky has just aswell.
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Old Nov 21, 2009 | 04:42 AM
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Originally Posted by Irvatron,Nov 21 2009, 01:33 PM
Just done that Matt, the alternator is fine judging by the values i got back from my fluke.
Checking for current drain has nothing to do with the alternator, it's checking to see if there is a load on the battery when the car is off

If the alternator is fine and the battery is charging, there is something in the car that is drawing power...therefore discharging the battery.

HTH
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Old Nov 21, 2009 | 04:47 AM
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Guy who used to work for the local Honda dealer sold me a new Honda battery for £30 cash.

I included it in the spares when I sold my 2nd S2000. Turns out one cell was kaput.

I would get the battery checked out, cell by cell if you can.
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Old Nov 21, 2009 | 05:01 AM
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Thanks guys.
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