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Anybody ever had the internal 3V battery die?

Old 09-25-2021, 10:47 PM
  #1  
rustyrivet
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Default Anybody ever had the internal 3V battery die?

I'm planning on replacing the internal 3V battery in my JR 8103 transmitter. Recently I found this old RCU post from member Mac_Man_UK mentioning something about "calibration" loss if the internal battery power is lost. Here is a screenshot photo of the post that he makes comments about the calibration concern;

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Perhaps if any of you had ever had an internal battery run down over the years so that your radio went dead on you, maybe you can describe to me what "calibration" problems you experienced??

I was NOT intending to make a special effort to try and replace the internal 3V battery quickly before power runs out of the circuit board. I was going to take my time to carefully solder a new 3V battery with tabs and wire leads into place, and NOT try to beat the clock doing it. Then, upon carefully soldering & completing the new internal battery installation, I planned to transfer the same airplane data back into this radio from another JR 8103 TX that I keep as a working spare. However, this talk about loss of "calibration" is not something I've ever heard of and it does concern me if I am to end up with a none-working JR 8103.

Last edited by rustyrivet; 09-25-2021 at 10:59 PM.
Old 09-26-2021, 11:00 AM
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Dick T.
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Basically you will lose all model programming but virtually nothing else. Gimbal calibration might be off a bit after the battery change but that is questionable as it can be off just from pot wear.

The post you referenced is nonsense. Does not matter how quick you switch out the battery the circuit voltage goes to zero similar to changing dry cells in a transmitter.

If switching concerns you solder some leads on a new battery of same voltage and solder it in parallel to the existing circuit. Remove and replace the old battery then unsolder the jumpered one.

A Futaba 9Z transmitter contained a lithium back up battery that needed replacing periodically, it held model setup information. All transmitter settings could be cleared and reset to factory by unplugging the 9.6 volt battery, removing it from the transmitter case. Inside the transmitter battery box two tiny holes became visible and by inserting a 'U' shaped paper clip, thus shorting the two circuit board pads beneath. This cleared all memory and reset the transmitter to factory settings. Gimbal, switches, etc., were not affected.

Not likely anything will be affected by taking you time replacing the battery.

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