Battery voltage OLED display '100%'?

The documentation tells me, that these information are on display

*arming failure messages*
  • flight mode*
  • battery voltage*
  • GPS Lock and satellite count*
  • Pre-arm passed/failed*
  • EKF status*


Left 4.1.0 dev - Omnibus F4 nano v.6.2
Right 4.0.7 - Matek F405-STD

Comparing the parameter lists in BAT section does not give me a clue, what those ‘100%’ mean.

Any idea, please.