What was found
CABIN EMERG LIGHT: CABIN INTERIOR EMERGENCY LIGHT OVER WORK TABLE DOES NOT ILLUMINATE DURING EMERGENCY LIGHT CHECK. THE LIGHT DOES ILLUMINATE WITH MAIN DC POWER. (PRE FLIGHT) // SIGNOFF // PERFORMED EMER UGHTING OPS CHECK, DOME UGHT OVER WORK TABLE DID NOT ILLUMINATE. ALLOWED BATTERY PACK TO CHARGE AND LIGHT WOULD ILLUMINATE BUT BATTERY WAS WEAK. REMOVED #1 BATTERY PACK AND REPLACED WITH REPAIRED UNIT. OPS CHECKED EMER UGHTING SYSTEM IAW CESSNA 680 AMM 33-50-00. NO DEFECTS NOTED