What was found
PHX - EEL - FLIGHT CREW REPORTED THE EMERGENCY EXIT LIGHTS ILLUMINATED AND REMAINED ON WITH THE FLIGHT DECK SWITCH IN ARMED POSITION. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY LIGHT BATTERY CHARGER AT BS 920 AND BATTERY PACKS AT SEAT ROWS 3, 11 & 17 LT AND FORWARD & AFT ENTRY WAY OVERHEADS. OPERATIONAL CHECK OF EMERGENCY LIGHTING SYSTEM WAS GOOD. PART NAME; BATTERY, MFG; IDD AEROSPACE, P/N; 9008-3-5A, COND; LOST CHARGE.