As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"ELEC" ANNUNCIATOR LIGHT IS ILLUMINATED ON P5-13 ELECTRIC METER PANEL. GROUNDED - YES. PERFORMED P5-13 ELEC LIGHT MESSAGE BIT, PER B737-800 FIM 24-631 TASK 801. FOUND FAULT MSG "BAT CHGR INOP 1" WOULD NOT RESET. VERIFIED C/B'S J9 A4 IS CLOSED AND P92 E1 IS CLOSED. ALLOWED BATTERY TO CHARGE. CLEARED FAULT, OP CK NORMAL, REF FIM 24-31 TASKS 801 & 829.