As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE FLIGHT CREW GOT AN ELECTRIC ABNORMAL MESSAGE ON EICAS. AIRCRAFT RETURNED TO MDT. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 1 BATTERY RELAY BOX. OPS CHECKED BAD. REMOVED AND REPLACED NR 2 MAIN BATTERY CONTROL SWITCH. OPS CHECKED BAD. REMOVED AND REPLACED NR 1 MAIN BATTERY CONTROL SWITCH. OPS CHECKED GOOD.