What was found
CABIN EMERG LIGHT: CENTER SECTION OF CABIN EMERGENCY LIGHTS AND OVER WING LIGHTS ARE REQUIRING A CHARGE PROCEDURE TO PASS THE PREFLIGHT TEST AND WILL NOT HOLD THE CHARGE FOR VERY LONG. EMERGENCY EXIT SIGNS WORK, ISLE PATH LIGHT BELOW LAV WORKS, AND SWITCH WORKS CORRECTLY. REMOVED #3 EMERGENCY BATTERY PACK PN: CBS28-1 SN: 2628M AND INSTALLED CUSTOMER SUPPLIED REPAIRED EMERGENCY BATTERY PACK PN: CBS28-1 SN: 009010. REMOVED #2 FAILED BATTERY PN CBS28-1, SN 2236M. INSTALLED CUSTOMER SUPPLIED REPAIRED BATTERY PN CBS28-1, SN 008942 AT THE #2 LOCATION. OPERATIONAL CHECK GOOD. IN REF TO CE-680A MM 33-50-06