As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS WILL NOT ILLUMINATE OR TEST WHEN THE FLIGHT ATTENDANT TESTS THEM. REMOVED AND REPLACED ALL EMERGENCY LIGHT BATTERIES. (REMOVED PART NUMBER: 2013-1A (FOR ALL 4) / REMOVED SERIAL NUMBERS: POS 1: 495284 / POS 2: 121685 / POS 3: 503167 / POS 4: 79393)