From: ham789@netzero.net   
      
   On 1/11/2014 8:47 AM, Jim Wilkins wrote:   
      
   >   
   > My experiments suggest that the resistance that matters can be   
   > measured as voltage drop and recovery when the battery is nearly   
   > discharged. For example one that I tested recovered from 10V to ~11.5V   
   > after the inverter load shut itself off.   
   >   
   > A DC-AC inverter is a convenient test load because it has a low   
   > voltage shut off to protect the battery and you can adjust the power   
   > by plugging in 120V heaters, light bulbs, soldering irons etc. My   
   > crock pot draws 70W or 100W and doesn't get hot enough to accidentally   
   > burn me or wires that touch it.   
   > jsw   
   >   
   >   
   I was gonna stuff a square wave into the load fixture and   
   measure the battery voltage steps on a scope.   
   I've found that to be a decent measure of resistance.   
   Doesn't get obscured by all the other battery voltage effects.   
      
   Your suggestion is a good one because it more accurately represents   
   the behavior under specific conditions measured.   
      
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