As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERG LIGHT: EMERGENCY EXIT LIGHTS IN CABIN BEGAN BLINKING IN FLIGHT AND THEN CAME ON STEADY. SWITCH WAS IN THE ARM POSITION THE ENTIRE TIME. REMOVED #2 E-BATTERY PN 7450LS-00 SN 005521 AND INSTALLED A NEW E-BATTERY PN 7450LS-00 SN 006881 IAW EP300 MM 33-52-01-00-801. PERFOMRED OPS CHECK FOR BOTH #1 AND #2 E-BATTERIES. OPS CHECKS ARE GOOD AT THIS TIME.WORK IAW EP300 MM 33-52-01-710-801