As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) DURING CABIN EMERGENCY LIGHTING CHECK BATTERY CAPACITY IAW AMM 33-51-00-710-003-A, EPSU BAT CAP MID R MESSAGE SHOWN. BATTERY 12WL TO BE REPLACED IAW AMM 33-51-38-000-002-A/400-002-A. BATTERY 12WL REPLACED AND TESTED SERVICEABLE IAW AMM 33-51-38-000-002-A/400-002-A"