Please bear with me, I'm new here.
My girlfriend's car battery died at Christmas due to being 6 years old and being left on a driveway for weeks in the frost. Bought and fitted new battery and all is good for five months. Drove car last Sunday fine. Tried to start it on Wednesday and battery is dead. Battery measures 0.22Vdc out of circuit.
Fitted new battery and all is good. Measured 13.76Vdc and climbing with the engin running so appears to be charging.
I don't have an ammeter to hand so can't measure the current drain with the engin off but will check this when I borrow my DMM from work on Tuesday but (fingers crossed) I'm hoping it will be ok. Will check it later on just to make sure.
The question is, what causes the battery voltage to drop to 0.22V. Even if there was cell damage it should still read higher than that. Is there some internal fuse I don't know about. It is a sealed battery, there is no damage to the casing and no signs of outgassing or corrosion.
I am hoping someone can help me understand the failure mode at work here.
My girlfriend's car battery died at Christmas due to being 6 years old and being left on a driveway for weeks in the frost. Bought and fitted new battery and all is good for five months. Drove car last Sunday fine. Tried to start it on Wednesday and battery is dead. Battery measures 0.22Vdc out of circuit.
Fitted new battery and all is good. Measured 13.76Vdc and climbing with the engin running so appears to be charging.
I don't have an ammeter to hand so can't measure the current drain with the engin off but will check this when I borrow my DMM from work on Tuesday but (fingers crossed) I'm hoping it will be ok. Will check it later on just to make sure.
The question is, what causes the battery voltage to drop to 0.22V. Even if there was cell damage it should still read higher than that. Is there some internal fuse I don't know about. It is a sealed battery, there is no damage to the casing and no signs of outgassing or corrosion.
I am hoping someone can help me understand the failure mode at work here.