As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATT 2 OVERTEMP WARNING MESSAGE APPEARED AFTER TAKEOFF. PERFORMED THE MEMORY QRC QRH PROCEDURES. OBSERVED BATTERY TEMP 70C(FLT 5213 FILED CLOSED)TROUBLESHOT PER FIM 24-36-00. FOUND TO BE FAILURE OF MAIN BATTERY NUMBER 2. REMOVED AND REPLACED MAIN BATTERY NUMBER 2 IN REF TO ERJ AMM 24-36-01. OPS CHECK GOOD AT THIS TIME. NO FURTHER FAULTS NOTED. AIRCRAFT OKAY FOR SERVICE.