Quote:
Originally Posted by claykin
I hear ya. And yup, I'm a guy so user manuals are a last resort. 
As a car ages so does its CCA of the battery. Just because BMW can monitor the slow discharge rate does not mean the battery will have the CCA's to start the car. I'm sure they do a good job monitoring the battery, but all they can do is go by the law of averages. I highly doubt they put a CCA type load when testing the battery for low signaling.
Thx for your reply. |
hey thanks for the reply and I agree on the CCA monitoring. I do know that from current discharge rate and charge up time that a batteries percent heath can be calculated like laptop batteries. I wonder if the car or BMW can tell you when the battery needs replacing based on the cars electronics or the data the car transmits to BMW. This does raise a concern for us on whether we can rely on their tech few years down the road. Hopefully a call to BMWNA can help!