What was found
OMA - DIVERTED FLIGHT - FLT 722 -C- EN ROUTE TO ORD FROM LAS THE FLIGHT DECK CREW OBSERVED ECAM WARNING BCL NR 1 FAULT AND THE NR 1 BATTERY DROPPED OFF LINE, NR 2 BATTERY WAS SHOWING 24 VOLTS AND NOT CHARGING. THE AIRCRAFT DIVERTED TO OMA MAKING AN UNEVENTFUL LANDING. MAINTENANCE PERFORMED BITE AND OPERATIONAL CHECKS OF NR 1 & 2 BCL (BATTERY CHARGER LIMITER) IAW AMM 24-38-710-001, THE SYSTEM RESET AND CHECKED NORMAL. THE FLIGHT CONTINUED TO ORD AND BACK TO PHX WITH NO FURTHER DISCREPANCIES. IN PHX THE NR 1 BCL WAS REPLACED AS A PRECAUTION PER AWA LIAISON ENGINEERING REQUEST.