As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY CHARGE ANNUNCIATOR ILLUMINATED TWICE IN FLIGHT. 1ST TIME IN CLIMB A FEW SECONDS AFTER GEAR RETRACTION AND CONTINUING THROUGH FL100 ALL AT ~10A. 2ND TIME WAS A FEW MINUTES INTO CRUISE FOR 2-3 MINUTES AT APPROXIMATELY 8A. MAINTENANCE REPLACED BATTERY AND CLEARED DISCREPANCY.