Author Topic: Under Load Battery Voltage Testing  (Read 196 times)

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Offline Bill Bradford

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Under Load Battery Voltage Testing
« on: April 10, 2019, 10:45:17 am »
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?

Thanks,
Bill

Offline Mark Fuess

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Re: Under Load Battery Voltage Testing
« Reply #1 on: April 11, 2019, 04:58:36 pm »
Yes.

Offline Bill Bradford

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Re: Under Load Battery Voltage Testing
« Reply #2 on: April 12, 2019, 11:25:35 am »
Thanks, Mark.

Offline Joystick

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Re: Under Load Battery Voltage Testing
« Reply #3 on: April 13, 2019, 07:03:27 am »
Make sure you have a 5 or 10 Watt resistor. It will get hot.
CHECK SIX

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Offline Bill Bradford

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Re: Under Load Battery Voltage Testing
« Reply #4 on: April 14, 2019, 12:33:03 pm »
Thanks, Steve. I plan to use a 10 watt resistor.

Bill