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-   -   Battery Cranking Volts (https://forum.a8parts.co.uk/showthread.php?t=13814)

North2007 6th February 2018 04:56 PM

Battery Cranking Volts
 
My car is showing 9.6 volts on cranking, its been slow to start after 4-5 days of not been driven. New battery last year, it’s a 95Ah 800A not the stronger 110 or 120. Would this make a difference?

27litres 7th February 2018 04:40 AM

CCA rating is more important than the Ah rating, though a higher Ah rating means it has "more to give" so to speak.
A voltage drop during crank is to be expected, as the battery is having the oomph pulled out of it.
I've never measured one to see if 9.6 is a standard voltage or not.

One thing I have learner over the years though is that you should never under rate a battery for a diesel below that of OEM.
In order to start the car, a smaller capacity battery will have more pulled out of it in comparison to a larger capacity battery, meaning the recovery time (as in charging) is higher.

North2007 7th February 2018 08:06 AM

Thanks Marty, I read if it falls below 10 volts while cranking, the battery is on its way out.


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