As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B777-33-3-7019 CABIN EMER LT DEEP CYCLE CAPACITY TEST FOUND R2 DR (M33097) BATTERY FAIL. TRANSFER REF NON - ROUTINE WO.1578450 AND ORIG BY V897794 R2 DR BATTERY (M33097) REPLACED AND TEST NORMAL AS PER AMM23-51-06 WORK ACCOMP BY MECH V920572 AND INSP BY V926996