As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT AT L1 POSITION FAILED TEST DURING SERVICE CHECK WALK AROUND. R & R BATTERY FROM THE BATTERY CHARGING PACK AT THE R1 POSITION IAW MM 31-51-52 201. OPERATIONS CHECKED NORMAL. BATTERY ABS 2013-1A R & R, SN OFF 94113 & SN ON 22917.