jt_armstrong said:

For ****s and giggles and also because I have nothing better to do today I measured the voltages on all 3 of my toys.

1999 V8
12.02v with engine off
13.8v with engine idling
13.8v with engine at 2000rpm

1997 V8
11.97v with engine off
13.67v with engine idling
13.67v with engine at 2000 rpm

Cherokee
12.3v with engine off
14.4v with engine idling
14.4v with engine at 2000rpm.

Worth stating that my meter hasn't been calibrated since the day I bought it which is about 10 years ago. That said none of my cars showed an increase in voltage with a higher rpm. Also all three batteries would likely be recommended for replacing given their low starting voltage state. All three started on the button as is the norm.

Click to expand...

jt_armstrong said:

For ****s and giggles and also because I have nothing better to do today I measured the voltages on all 3 of my toys.

1999 V8
12.02v with engine off
13.8v with engine idling
13.8v with engine at 2000rpm

1997 V8
11.97v with engine off
13.67v with engine idling
13.67v with engine at 2000 rpm

Cherokee
12.3v with engine off
14.4v with engine idling
14.4v with engine at 2000rpm.

Worth stating that my meter hasn't been calibrated since the day I bought it which is about 10 years ago. That said none of my cars showed an increase in voltage with a higher rpm. Also all three batteries would likely be recommended for replacing given their low starting voltage state. All three started on the button as is the norm.

Click to expand...