I was flying my QC with 3S 4000MAh battery but for hovering 700 PWM (70%) of throttle was required. Therefore I moved to 4S 4000MAh and now the hovering PWM is 540 (54%) only but the Mission Planner shows Power Level error (as red) on the PreFlight check window and has no check mark. I have also done the power configuration (ignoring the current part) and the voltage being shown on the HUD is also correct but still it is being shown as red. However there is no effect of this in the functioning of the QC. IF any one who has moved from 3S to 4S can please guide me or provide the link to resolve this because being the only red line in my PreFlight check window it is irritating me, thanks.