Today's Message Index:
----------------------
 
     1. 04:35 PM - Battery capacity test (Paul Fisher)
     2. 08:02 PM - Re: Battery capacity test (Charlie England)
 
 
 

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Time: 
04:35:49 PM PST US
From: 
Paul Fisher <rv7a.n18pf@gmail.com>
Subject: 
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


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Time: 
08:02:04 PM PST US
Subject: 
Re: 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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