Battery Voltage Seems Low To Me...

echo7

10 Year Member
Mar 30, 2005
706
40
59
FL
My GT usually reports the battery voltage around 11.7-11.9 when the car is off. I've always expected a new, fully charged battery, to report closer to 12.5 or more when it's fully charged. Had Ford check it out to be sure, because my 05's battery died on me within the first year. They said it's normal, and I'm inclined to believe them since I haven't had any starting issues, but was wondering if you guys are getting the same results from your Mustangs?


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Dont think I've ever had a vehicle show 12+ volts with the key in the on position before. 11.7 seems perfectly fine. When batteries start to take a digger the voltage will often appear to be fine but they fail the load test.