Today's Message Index:
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1. 08:54 AM - Re: Battery Cap Tester (jonlaury)
2. 09:50 AM - Re: Re: Battery Cap Tester (Robert L. Nuckolls, III)
3. 10:28 AM - Re: Battery Cap Tester (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Battery Cap Tester |
Bob
I'll try it again to see if I get something different.
Why is it that Odyssey comes up with a 9 amp load @ 12v making 75W?
I thought you could take to the bank the relationship of volts, amps and watts.
9 amps x 12v should be 108W in my perfect world.
J :? hn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=404714#404714
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| Subject: | Re: Battery Cap Tester |
At 10:53 AM 7/15/2013, you wrote:
>
>Bob
>
>I'll try it again to see if I get something different.
>
>Why is it that Odyssey comes up with a 9 amp load @ 12v making 75W?
>I thought you could take to the bank the relationship of volts, amps
>and watts. 9 amps x 12v should be 108W in my perfect world.
>
EXCELLENT QUESTION! I'll try to study it
further and see if I can deduce their
methodology. Discharging the battery at
constant watts and constant amps for a
non-linear event will produce some disparity
of values . . . but I can't see that it
would be that big.
Bob . . .
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| Subject: | Re: Battery Cap Tester |
Bob
I'll try it again to see if I get something different.
Why is it that Odyssey comes up with a 9 amp load @ 12v making 75W?
I thought you could take to the bank the relationship of volts, amps
and watts. 9 amps x 12v should be 108W in my perfect world.
Here's an excerpt on PC680 data from another Hawker-Enersys
document . . .
Emacs!
. . . and the companion plot
Emacs!
This plot is consistent with tabular data and with your
test results. I must conclude that the earlier posting was excerpted
from erroneous data.
The fact remains that your battery seems to be in good shape . . .
which still leaves us with questions about the observed self-discharge
rate.
Bob . . .
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