As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT, FOUND L1 DOOR AND COCKPIT ENTRY DOOR EMERGENCY BATTERY PACKS DRAINED TO DIM ILLUMINATION. REPLACED BATTERY PACKS (2 EA). OPERATED EMERGENCY LIGHTS SYSTEM AND FOUND OPERATING NORMALLY. OK FOR SUBSEQUENT FLIGHT. AC WAS RETURNED TO SERVICE. (K)