As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN MID FLIGHT EMERGENCY LIGHTS CAME ON STEADY. TRIED RESETTING THE SWITCH BOTH IN AIR AND ON THE GROUND LIGHTS ARE ON IN THE ARM POSITION. THEY DO TURN OFF WHEN THE SWITCH IS TURNED OFF. REMOVED FWD AND AFT EMERGENCY BATTERIES AND INSTALLED NEW BATTERIES PERFROMED OPS CHECK WITH NO DEFECTS NOTED REF EMB PHENOM 300 AMM 33-52-01