As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY OVERHEAT & TEMP INDICATION: BATTERY EXCEDENCE EICAS MESSAGE ILLUMINATED IN FLIGHT AT FL410. EMERGENCY CHECKLIST COMPLIED AND ELECTRICAL EMERGENCY BUTTON PUSHED. BOTH #1 BATTERY AND #1 GENERATOR WERE HIGH VOLTAGE. // SIGNOFF// REMOVED AND REPLACED LH GENERATOR IAW EMBRAER EMB-505 AMM 24-3L-02-000-801-A. OPS CHECK GOOD AT THIS TIME.