As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRE DEPARTURE CREW OBSERVED MAIN BATTERY DISCHARGE ADVISORY CAME ON SEVERAL TIMES AFTER STBY PWR TEST. EACH TIME STANDBY POWER TEST CARRIED OUT MAIN BATTERY DISCHARGE ADVISORY WOULD COME ON AFTER TEST COMPLETED WITH ASSOCIATED DISCHARGE. BATTERY AND CHARGER REPLACED AS PRECAUTIONARY MEASURE WITH CREW REQUEST DUE CONCERNS OVER PENDING LONG SECTOR.