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8th December 2021, 19:45 | #1 |
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Rover 75 Saloon Join Date: Feb 2012
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Battery draw/drain
So I came out to the car this morning to a flat battery, first time it's ever happened. Jump stated the car and ran fine, alternator over 14.3v and it charged up on the way to work, I removed the battery and did a battery test, battery very good with all cells fine, then fully charged with ctek charger and reconnected, then with an amp clamp did a battery draw test, found when locked 0.3a for a few mins then 0.1a when asleep. thought this was high so messed with the fbh remove relay I have fitted and found a bad connection, fix this and the draw dropped to between 0.07 and 0.08 amps. Is this classed as a high current draw or okay.
Personally I thought anything under 0.1 amp is acceptable Thanks in advance for any replys Sent from my SM-G981B using Tapatalk |
8th December 2021, 19:53 | #2 |
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R75 Saloon. Join Date: Feb 2009
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With your latest check all is OK now.
PS. After having a flat battery a 24 hour charge is really required. |
8th December 2021, 19:55 | #3 |
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Battery has been fully charged then auto dropped onto trickle for a few hours, will be fine and it's gonna get another charge at the weekend.
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8th December 2021, 20:16 | #4 |
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Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007
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On a CDT I would investigate a long-term drain of anything over 50mA.
See https://www.the75andztclub.co.uk/for....php?p=2901167 |
8th December 2021, 20:27 | #5 | |
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Quote:
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8th December 2021, 20:33 | #6 | |
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Quote:
If that happens it seems like your battery is on its last legs and is not taking a charge.-- |
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8th December 2021, 20:52 | #7 | |
This is my second home
Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007
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Quote:
Are you sure your clamp meter is capable of measuring DC current? Many are not. For a battery in good condition, .08A would drain a fully charged 096 CDT battery in about 25 days. Could it be that your interior lights remained on due to frozen door sensing contacts? As COLVERT says, I would get the battery to a fully charged state by charging it for 24 hours and then repeat the tests. |
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10th December 2021, 20:42 | #8 |
This is my second home
R75 Saloon. Join Date: Feb 2009
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With the sort of trouble you are having with your battery discharging so quickly you really need a garage to drop test it.
This will give the best idea about the condition of the plates and acid in your battery. |
11th December 2021, 10:25 | #9 | |
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Quote:
Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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