As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REJECTED TAKEOFF DUE TO BRIEF BATTERY OVER-TEMP LIGHT AT INITIAL POWER UP. RESOLUTION, INSPECTION PERFORMED ON LEAD ACID BATTERY INSTALLATION AND FOUND ZONE WARM DUE TO EXTENDED GROUND OPERATION WITH ADJACENT FREON AIR-CONDITIONING UNIT UNDER HIGH AMBIENT TEMPERATURES. OPENED AREA TO ALLOW COOLING, SYSTEM CHECKED OK. NO FURTHER MALFUNCTIONS. AFM EMERGENCY PROCEDURES FOR BATTERY OVER-TEMP NOT APPLICABLE TO LEAD ACID BATTERY INSTALLATION.