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Home > Technical > Flat battery again |
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EYorkshire Member Since: 18 Nov 2010 Location: (!) Posts: 4392 |
I know the battery is fairly new but it still could be that its duff, the green indicator is only showing that you have one good cell out of the six. |
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30th Dec 2014 2:43 pm |
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taztastic Member Since: 03 Feb 2011 Location: North West Posts: 8652 |
What is the open circuit voltage of the battery? as I think it should be 12.6v if it is healthy.
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30th Dec 2014 3:01 pm |
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Cobbet1 Member Since: 07 Aug 2013 Location: Berkshire Posts: 166 |
Just taken it off charge and it reads 13.4 will test it again tomorrow before trying to start it, could be duff battery I guess as it starts on the button when it's just been charged , literally is just over a year old though
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30th Dec 2014 4:42 pm |
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Thehorse Member Since: 07 Dec 2014 Location: berks Posts: 78 |
There is a 0.022V/degree temperature coefficient on a lead acid battery, so the quoted 12.6V 100% nominal battery voltage at 20degC would actually be 12.16V at 0 degC hence batteries struggle in the winter. The way I decided my battery is probably shagged is by timing how long it took to charge it. It went from 12.0V to 13.5V in well under an hour - charge current dropping from 5A to <1A in this time. If it still had a reasonable capacity it would have taken much longer with the charge current staying higher. |
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30th Dec 2014 5:40 pm |
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Cobbet1 Member Since: 07 Aug 2013 Location: Berkshire Posts: 166 |
Ok , think you guys might be right and it's a duff battery, tested this morning before starting car , battery connected overnight it read 12.2v , left meter on when turning it over failed to start 1st time dropped down to 11something when cranking , 2nd time down to 7 odd , so looks like battery even though it's only a year old , but still concerned that there may be a drain that's caused battery to die in 1st place.
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31st Dec 2014 11:50 am |
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Cobbet1 Member Since: 07 Aug 2013 Location: Berkshire Posts: 166 |
Car into dealers today, explained possible battery drain , battery issue, they say battery is shot, ok all good should get that swapped by supplier tomorrow, asked them if they could check for a drain anyway whilst they had car, wouldn't do that as battery shot!!
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2nd Jan 2015 7:47 pm |
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Cobbet1 Member Since: 07 Aug 2013 Location: Berkshire Posts: 166 |
update
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25th Jan 2015 5:35 pm |
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RichP Member Since: 21 Sep 2014 Location: Worcestershire Posts: 1369 |
Result! |
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25th Jan 2015 7:15 pm |
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