As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LINE CHECK, MAINTENANCE FOUND THAT BOTH OF THE OVERWING EMERGENCY EXIT SIGNS WOULD ILLUMINATE WHEN BATTERY SWITCH WAS TURNED OFF. MAINTENANCE REPLACED THE BATTERIES AND THE POWER SUPPLY, THE LIGHTS THEN RETURNED TO AN OPERATIONAL CONDITION. (2010-00817).