As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PERFORMED EMERGENCY LIGHTING BATTERY PACK CAPATITY CHECK FOUND L1 AND R1 MASTER CALL LT /EXIT SIGN STAY ON ONLY 4 MINUTES REFER HAECO NON-ROUTINE NO.9457091. REPLACED M33093 BATTERY PACK AND PERFOR MED TEST FOUND NOMAL REF AMM 33-51-06-960-802 REV 97.