What was found
FIFTY MIN INTO FLT AT FL370 RECEIVED AT LEVEL BATTERY DISCHARGING ALERT. ALERT STAYED ON ABOUT 30 SEC 10 MIN LATER IT CAME ON AND STAYED ON. A/C DIVERTED TO CHS. DURING DESCENT (FL 200) ALERT WENT AWAY AND DID NOT RE-OCCUR. REPEAT WRITE-UP. NEEDS NEW A/C BATTERIES. ORDERED SAME. REMOVED AND REPLACED AIRCRAFT BATTERIES IAW MD-10 MM. REMOVED AND REPLACED EPCU IAW MD-10 MM 24-08-01-4, REMOVED AND REPLACED B1-134 RCCB IAW MD-10 MM 24-50-01. ALSO FOUND TERMINALS ON SHUNT S4-1 LOOSE TIGHTENED TERMINALS, FOUND TEMP SENSOR ON LT BATTERY BAD, A/C BATTERIES ON ORDER.