As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY BATTERY CHARGE FAULT LIGHT CAME ON DURING CLIMB OUT. AC RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY BATTERY. MAINTENANCE CONTROL STATES BATTERY WAS NOT HOT WHEN REMOVED. AIRCRAFT WAS RETURNED TO SERVICE. (K)