As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, ODOR OF WIRE INSULATION BURNING IN COCKPIT AND FLIGHT ATTENDANT JUMPSEAT, ALONG WITH CABIN AND CABIN EMERGENCY PUSHBUTTONS ILLUMINATING. MAINTENANCE FOUND EMERGENCY BATTERY NR 2 NOT INSTALLED CORRECTLY. REMOVED AND REPLACED NR 2 EMERGENCY BATTERY, POWER SUPPLY IAW EMB145 MM 33-50-04. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.