I have posted this to advanced flight systems forum but will also post here. On a recent flight the Earthx battery outputted a flashing code to efis input but was unable to interpret the flashes maybe due to filtering or some incompatibility? with efis input. Efis displays ?battery fault? but the erratic flashing doesn?t coincide with a logical sequence. I know I can simply hook up an led but am trying to use efis input. Anyone observe this or experience a solution?