As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: ALL OVER WING EMERGENCY LIGHTS INOPERATIVE. TROUBLESHOT BAD BATTERY PACKS M1694 AND M19695. REMOVE AND REPLACED EMERGENCY LIGHT BATTERY M1694 (AALA202408309966) AND M19695 (AALA202408300226), OPERTIONAL TEST GOOD. PER B737MAX8 AMM 33-51-06.