As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE AT FL390, RECEIVED BATTERY DISCHARGING ALERT. AT 10,000 FT ALERT DISAPPERED. R & R THE R2-24 RELAY IAW MM 24-34-01-2 AND SPWM 20 AND WDM 24-33-01. ALSO R & R RELAY R2-5145 IAW FIM 24-30-19-00 AND WDM 24-30-19-00. PERFORMED A RTS OF EPCU GROUND OPS CHECKED NORMAL. PERFORMED A BATTERY CHARGER TEST IAW MM 24-34-03-5.