As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER PRODUCTION REQUEST, ESPU BATTERY "L" FAILED OPS TEST. REMOVED AND REPLACED IIWL EPSU BATTERY PER A320 AMM 33-51-39-000 -007-C2 / 33-51-39-400-007-C2. PERFORMED OP CHECKS PER A320 AMM 33-51-00-710-001-A / 3351-00-710-002-62. SYSTEM CHECKS GOOD.