----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Sat 02/12/22: 2
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Today's Message Index:
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     1. 04:35 PM - Battery capacity test  (Paul Fisher)
     2. 08:02 PM - Re: Battery capacity test  (Charlie England)
 
 
 
________________________________  Message 1  _____________________________________


Time: 04:35:49 PM PST US
From: Paul Fisher <rv7a.n18pf@gmail.com>
Subject: AeroElectric-List: Battery capacity test

I built a battery capacity tester similar to the one described in this
document:
http://www.aeroelectric.com/articles/battest.pdf

I tested my battery down to 10.5 volts and got 152 minutes on a 16 AH
battery.  So I think I'm at ~62% of the original capacity.

Now my question - it was 17 degrees Fahrenheit (-8C) when I did my test, so
do I need to compensate the test for temperature?

Either way I think it's time for a new battery.  I'm just curious about the
physics of the test when done at colder (or hotter!) than some standard
temperature.

Paul Fisher

________________________________  Message 2  _____________________________________


Time: 08:02:04 PM PST US
Subject: Re: AeroElectric-List: Battery capacity test
From: Charlie England <ceengland7@gmail.com>

What was the duration when it was new?

=81=A3Get BlueMail for Android 
=8B

On Feb 12, 2022, 6:39 PM, at 6:39 PM, Paul Fisher <rv7a=2En18pf@
gmail=2Ecom> wrote:
>I built a battery capacity tester similar to the one d
escribed in this
>document:
>http://www=2Eaeroelectric=2Ecom/articles/batte
st=2Epdf
>
>I tested my battery down to 10=2E5 volts and got 152 minutes on
 a 16 AH
>battery=2E  So I think I'm at ~62% of the original capacity=2E
>

>Now my question - it was 17 degrees Fahrenheit (-8C) when I did my
>test, 
so
>do I need to compensate the test for temperature?
>
>Either way I think
 it's time for a new battery=2E  I'm just curious about
>the
>physics of th
e test when done at colder (or hotter!) than some standard
>temperature=2E

>
>Paul Fisher

 

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