What was found
(CAN) PILOT ENCOUNTERED COMPLETE (GREATER THAN 50 PERCENT) ELECT. FAILURE IN FLT. AFTER ATTEMPTING TO GET A/C RADIOS TO TRANSMIT/RECEIVE, PILOT SQUAKED RADIO FAILURE CODE. FURTHER ATTEMTPS AT GETTING OTHER ELECT. SYSS TO FUNCTION, PILOT FOUND THAT ALL ELECT. SYS WAS UNSERVICEABLE. A/C RETURNED TO POINT OF DEPTR & THEN CONTACTED TOWER ON LAND LINE.AFTER BRIEF INSP , FOUND THAT A/C BATTERY COMPLETELY DISCHARGED. BATTERY (NEW & INST NOV.2000) ELECTROLYTE LEVEL INSP OK, BATTERY CHARGED OVERNIGHT. AFTER BATTERY CHARGED, GROUND RUN/FUNCTION CHECKED. NOTED WITH CHARGING SYS COMPLETELY LOADED UP, CHARGE IND. WEAK. SUSPECT BATTERY VOLTAGE INITY LOW & CHARGING SYS UNABLE TO KEEP UP WITH DE