I have a Futaba BR-3000 meter for testing my receiver batteries. However, I recently discovered that it does not test the battery with a load on it after I compared it to a receiver switch that had voltage level lights. While the Futaba tester showed 99% capacity remaining, the receiver switch showed red, a level indicating a very low voltage. This was proved correct when I tried to move the servos and they were very sluggish. I charged the battery and the switch showed green and I had normal servo function. I researched the Futaba meter and found out that it does indeed test without a load.
I plan to put a resistor in series with the tester leads in order to test the 6 volt battery under load. In order to produce an approximately 1 to 2 amp load, I will use a 5 ohm resistor. Does this make sense to you guys?
Make sure you have a 5 or 10 Watt resistor. It will get hot.
Thanks, Steve. I plan to use a 10 watt resistor.