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ST16s low battery warning

Lately I have been getting a low controller voltage warning even though all batteries show green
The green battery Icon includes a voltage percentage. What percentage are you seeing?
Icon volts.jpg

Are you seeing voltage warnings in the "History File"?
History.jpg

Have you checked the battery voltage with a multimeter?
ST16S Battery .jpg

You can also upload your flight logs for review:
Typhoon H Plus Flight Log Retrieval
 
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The controller battery shows green at 90%, I have not checked the voltage with a meter or saved the recent flight history log. I always charge all batteries to 100% and fly to the 1st battery warning which is around 50%. The controller battery will show around 85% at this point.They are stored at this level.
What should the controller voltage be at when 100% green is showing?
 
The controller battery shows green at 90%, I have not checked the voltage with a meter or saved the recent flight history log. I always charge all batteries to 100% and fly to the 1st battery warning which is around 50%. The controller battery will show around 85% at this point.They are stored at this level.
What should the controller voltage be at when 100% green is showing?
"...I have been getting a low controller voltage warning..."
"...and fly to the 1st battery warning.."
Talking about two batteries at the same time is a little confusing.
In post #1, you were asking about a "low controller voltage warning" which I took to mean the controller battery voltage. In post #3, you mentioned the "1st battery warning" which is the Flight battery.
Please clarify which battery is giving questionable warning messages.
If you could do a screenshot of the message "History" page as shown above, it might make things easier to understand.

"or saved the recent flight history log."
Note the "History" is not the same as the "Flight logs". Also, neither the "History" nor the "Flightlogs" have to be saved manually. The system saves them automatically. All we have to do is retrieve them when needed for review.
 
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If this is what I think it is, it is a typical message when the H Plus is first powered up. It is referring to the aircraft flight controller and gets sent before the aircraft finishes initializing.

In the infancy of the H Plus it was a cause for concern, but has not been a real concern for several years.

If your issue is something else please elaborate. Your flight logs are stored automatically and can be retrieved and posted here using the information here
 
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