As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FORWARD EMERGENCY LIGHT BATTERY FAILED THE FUNCTIONAL TEST IN ACCORDANCE WITH PHENOM 300 AMM 33-52-01, BATTERY FAILED AT 15:35 SECONDS AT 20VDC. PASSING TIME IS 22 MIN AT 20VDC. PERFORMED REPLACEMENT #1 FORWARD EMERGENCY LIGHT BATTERY WITH A NEW BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-01. PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHTS BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-00. NO DEFECTS NOTED.