Bill D. wrote:


 
       I have found that the cheapest way to load test (capacity test) a battery is with a home-made water-cooled dummy load, a voltmeter, a stop watch, and something to measure current.

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I think ( and I'm certainly not an EE, Tracy will attest to that) you might get a more representative number easier by useing 3 50 watt 12 volt halogen track lights and the same bulbs make cheap landing lights :>)
I had to wire them in parallel because they would only glow dim when in series and not pull much current. You can count on 4 amps per bulb until the voltage drops below 10 volts. Count the time till 10 volts and multiply hours by bulbs by 4 and you will have how many amps that batter is good for. 2 bulbs might be more representative of the rotary operating load, I measured 7.8 for mine.

Bernie, N19VX is now legal to fly, just have to get it ready to fly now.