As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY BATTERY PACK M730 FAILS TEST VERIFIED EMERGENCY LIGHT BATTERY POWER SUPPLY WAS PROPERLY CONNECTED AND ALLOWED BATTERIES TO CHARGE THROUGH THIER DEEP CYCLE TIME REF B757 AMM 33-51-07-02. OPS CHECK OF EMERGENCY BATTERIES GOOD REF B757 AMM 33-51-00-5, NO DISCREPANCIES NOTED.