p4p flashing 2 red 6 green

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    Flashing 2 red 6 green

    Indicating bad battery, BUT I have 3 old and 2 slightly used batteries and they all make my p4/p4p flash this code. I have noticed while flying at my house it indicates flying in a class c air space do not fly over 685 ft. I never do! I’m under outer ring 8 miles of airport but get this when I...