Frsky D8 keep showing wrong lipo battery voltage A2 keep showing 3.2V my 2s lipo is not that low.

Looks like it's limited to 3.3, so you'll need to use the OpenTX software to scale it. As always, Oscar has an article (https://oscarliang.com/telemetry-frsky-taranis-d4r-ii/). Here's the bit about calibrating the voltage.

Quote:A1 and A2 are the analog telemetry ports on the receiver. On D4R-II we are using A1. First we need to setup the range. The receiver’s maximum input voltage used for telemetry is 3.3V. Internal voltage divider is 4:1. Maximum voltage reading for A1 is 3.3×4=13.2. In my setup I use 13.3V as this is recommended. Detailed video on telemetry voltage calibration can be found .

Thanks i will visit the link and watch this video.

For my 2s 300 mAh lipo i time 3.3 X 2= 6.6 i don't know how should i enter this in the QX7.

And i use a multimeter my multimeter show me the Frsky D8 is putting out 5 volts i don't know how should i change the range on the Taranis QX7 because the Radio he is using is the Taranis X9D Plus.

These are default settings i didn't change nothing because there is a Negitive and Positive.