As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY POWER BAT 1 LO ON PRE-FLIGHT. RELEASED FOR SERVICE IAW MEL: 33-50-02. REMOVED AND REPLACED EMERGENCY EXIT LIGHTS POWER SUPPLY IN ACCORDANCE WITH MD10-10 AMM 33-51-01-4,5; OPERATIONAL TEST SATISFACTORY. ACFT. OKAY FOR SERVICE.