As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ARRIVED AT AIRCRAFT TO FIND BOTH OVERWING EMERGENCY LIGHTS ILLUMINATED AND INSIDE THE AIRCRAFT THE FLOOR EMERGENCY LIGHTS AFT OF THE EMERGENCY EXIT ROWS ILLUMINATED ALONG WITH OVERHEAD EXIT LIGHT. THE LIGHT SWITCH IN THE COCKPIT WAS IN THE OFF POSITION. REMOVED AND REPLACED BATTERY POWER SUPPLY IAW EMB 145 MM 33-50-04. OPS CHECK GOOD.