As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED - BATTERY LOW ALERT. REMOVED AND REPLACED MAIN BATTERIES PER AMM 24-34-02-4 & BATTERY CHARGER PER AMM 24-34-03-4. OPERATION TEST SATISFACTORY. PERFORMED EMERGENCY POWER SYSTEM TEST PER AMM 24-34-00-5. NO DISCREPANCY FOUND. A/C RETURNED TO SERVICE.