Santa <santa19992000@yahoo.com> wrote:
> Honda dealer said (when I took my car for 60K miles service), Battery
> test Bad - recommended to change battery, Sears said no need to
> cgange, unless the car started with jumpstart. These are the results
> when Honda printer for me when the dealer tested my battery (5 years
> old car, bought brand new 5 years back, sofar I didn't change the
> battery).

> Battery size - 440CCA
> Initial voltage - 12.97V
> Loadvoltage 9.90V
> State of the charge - 91%
> Resistance - 0.0mOhm
> Battery temp - 70F

> Bad tested BAD

I think five years is excellent life from an OEM battery.

The failure mode might be that if you leave your lights on once, and need
a jumpstart, the battery won't hold a charge at all after that.
You would prefer to know that the battery is going to go bad just before it
does.

Did Sears actually test it? I think Sears, Kragen, and the dealer probably
all use a very similar load test. Probably 15 seconds at a load equal to
the battery rating, maybe 440Amps in this case.

9 volts probably won't start the car. 9.9 volts in this test may indicate
that it won't start the car on a cold day...