As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SHUT DOWN WITH THE BATTERIES DISCONNECTED AND THE EMERGENCY LIGHT SWITCH OFF, THE RIGHT OVERWING EMERGENCY LIGHT OUTSIDE. SEAT 3 EMERGENCY LIGHTING, AND MAIN CABIN EXIT LIGHT REMAIN ON. CORRECTIVE ACTION: INSPECTED FOUND #2 EMERGENCY BATTERY DEAD. REMOVED AND REPLACED #2 EMERGENCY BATTERY IN ACCORDANCE WITH CE-680A AMM 33-50-06. OPS CHECK NORMAL.