As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY CHARGER INDICATES RATE OF 50 AMPS, 29 VOLTS. BATTERY AND CHARGER REPLACED PRIOR TO FLT, CREW REPORTS. RTF. *S/D* THE MAIN BATTERY AND BATTERY CHARGER WERE REPLACED. THE FINDING REPORT ON THE BATTERY IS NO FAULT FOUND. THE CHARGER WAS TESTED AND NO FAULT FOUND. SUSPECT THE HIGH CHARGING RATE MAY BE CAUSED BY LOW BATTERY VOLTAGE.