As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY POWER SUPPLY M1672 LOCATED ON AFT LOWERED CEILING PANEL FAILS OPS CHECK. TRANSCRIBED FROM HAECO N/R 9280211 REMOVED AND REPLACED BATTERY PACK M1672 LOCATED ON AFT LOWERED C EILING PANEL IAW BOEING 737NG AMM 33-51-06. OP CHECKS GOOD HAECO MECH:V895816 INSP QC452