As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV EMERGNCY LIGHT FAILS PREFLIGHT TEST AND DOES NOT HOLD A CHARGE WITH CHARGING PROCEDURE. VERIFIED DISCREPANCY. CONNECTED EXTERNAL POWER AND ALLOWED BATTERIES TO CHARGE FOR TWO HOURS. ORIGINAL DISCREPANCY REMAINS. REMOVED #4 E-LIGHT BATTERY PN 6430028-1 SN C25-10096 AND INSTALLED A NEW BATTERY PN 6430028-1 SN E25-10324. OPS CHECKS GOOD AT THIS TIME. WORK REFRENCING MM 33-50-06.