OK. Continuing to learn on my Chimera 7, and my Radiomaster TX16s MAX.

I have a battery alert set for 3.7v per cell. This is giving me a voltage in Red at the bottom of my OSD when I reach about 22.2V.

I have noticed, I'm pretty sure after it happening a couple times, that when the battery voltage warning pops up in red I can no longer change modes on my receiver, for example Angle to Horizon or the opposite. 

Is there some relationship between the battery alert being triggered and changing modes?

This has happened to me when I have been coming in to land in horizon and wanted to change to angle and it would not let me.

And just to test it I tried to switch from angle to horizon after it came on and it would not switch.

If there is a relationship between the warning and the modes, would it affect my failsafe or my GPS return as well. I have not been brave enough to try them when the warning is on. I still have failsafe assigned to a switch just to make sure the GPS return worked as a failsafe. Should probably remove it now that I know it works, but I do have GPS return assigned to a switch just in case I loose my goggle signal.

Mike.

I did not think the battery warning would limit our ability to change flight modes. I will need to test this at some stage when the weather is better to fly.

I'm also going to take this one out and try it again and test my mode switches before and after I get the low battery warning Red Voltage number in my OSD. My (good) problem is I'm running 5500mwh 6S batteries, so I have to fly a nice long time to get the warning. Or I could use my charger to discharge them down to 3.9 vols per cell before I start a flight. The flight in question ended up being 18 minutes at full on cruising speed and when I landed I had just under 3.7 volts per cell and 11% battery. Probably need to back off a little. 11% is a bit low for my comfort level. Don't want to damage my LIPO's

I hope it's not an issue with betaflight programming.

Well if anyone has seen this before, I've just confirmed it. I have my battery warning set at 3.8 volts per cell. Prior to that my angle/horizon mode switch works as well as my GPS Rescue mode. After my voltage at the bottom of my OSD turn red and my volts per cell hit 3.8, that switch is locked out and I'm stuck in what ever mode I'm in till I land, but the GPS Rescue switch still works thankfully. I'm glad those are the only flight modes I have programmed because I can land carefully in both of them.

Out of interest, what version of Betaflight is installed on your quad? You can find that out by running the "version" command in the CLI.

I'm using Betaflight Configurator 10.8.0 (5ec9465)

Although iFlight included a paper with the quad called BMI270 Custom Target Notice!

This says this BNF was flashed with our iFlight custom target based on Betaflight 4.2.11.

They say it is because Betaflight 4.3 was only a release candidate and something about supporting the BMI270 gyro and the DPS310 barometer.

I should write them and see if if they have an updated firmware posted now that 4.3 is released.