Quote:
Originally Posted by gsantopaolo
Hello everyone,
Hope you are doing well.
I noticed a strange (to me) battery drain on the BMW.
Since we went on lockdown, mid-March I tested the battery with a multimeter, and it was like 11.50V after I was not using the car for like a month.
I bought a battery charger, the Einhell CE-BC 6M, and on March 26th, I fully charged the battery, so it was like 12.6V.
Today I rechecked the battery with the multimeter, and it is 12.1V
I was wondering if it can be due to a Parasitic Battery Drain Or if this is normal, and I have to charge it again.
Looking forward to hearing from you and stay safe
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I would say it is normal, I average about 50-60mins driving a week and even less back in March-May due to lock down. I noticed recently my auto start/stop never kicks in so I suspect my battery is not full enough.
Last week I used a trickle charger to charge my car, and based on my calculation it took about 30Ah to full. Since the battery volume is like 90Ah, it means it loses about ⅓ of the charge.