As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV EXIT SIGN/LIGHT: SOME EMERGENCY LIGHTING IS INOPERATIVE. EXIT SIGN ON BULKHEAD BEHIND SEAT 7, EXIT SIGN ON TOILET FACE PANEL, DOWN LIGHTS AT TOILET BASE ARE ALL INOP. PACK WAS CHARGED FOR 30 MINUTES ON APU WITH NO CHANGE. CORRECTIVE ACTION; REPLAED FAULTY #4 EMERGENCY LIGHTING BATTERY. CHARGED BATTERY AS REQUIRED. PERFORMED OPS. CHECK OF EMER. LIGHTS, OPS. GOOD.WORK DONE IN REFERENCE TO CESSNA CE-680 AMM 33-50-10.