As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY PACK M1672, LIGHTS SHUT OFF PRIOR TO 15 MINUTES MINIMUN (REF AAR NR 99976630). REMOVED AND INSTALLED NEW BATTERY PACK M1672 IAW B737 AMM 33-51-06-960-805. OP CHECK GOOD(SDR NO. 1033252)(WORK ACCOMPLISHED BY V934989 AND AAR QC A-83 V955067).