As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CABIN L2 DOOR AREA M33096 EMERGENCY POWER SUPPLY BATTERY LOW CAPACITY,ORIGINATED BY EMP V903172, REF TO HAECO NON ROUTINE N O.9472883 SPEC NO.B777-33-3-7019. PERFORMED BY EMP V903172,REPLACED THE CABIN L2 DOOR AREA M33096 EMERGENCY POWER SUPPLY BATTERY PACK AND OP TEST CARRIED OUT,FOUN D NORMAL AS PER AMM 33-51-06-960-802 REV 99,IDT BY TA705.