As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECENTLY INSTALLED SYSTEM TRUE BLUE BATTERY WAS GETTING A RED TEMP HOT CAUTION LIGHT FOR THE AIRCRAFT BATTERY WHEN THE STARTER BUTTON WAS PRESSED. THE BATTERY WOULD NOT PHYSICALLY BE HOT BUT THE TEMP LIGHT WOULD ILLUMINATE ABOVE 3% N1 AND EXTINGUISH BELOW 3% N1.