AN SMA IN VMC HAD AN ELECTRICAL AND COMS FAILURE.

Narrative

ON IN IFR FLT PLAN FROM DNN TO CSG; I NOTICED THAT THE BATTERY WAS DISCHARGING. I TURNED OFF ALL ELECTRICAL INSTS EXCEPT 1 RADIO AND THE XPONDER. THE BATTERY BEGAN CHARGING AND AFTER 15-20 MINS I CHKED THE BATTERY CHARGE ON THE STORMSCOPE. IT HAD BUILT BACK UP TO 10.5 FROM 6.5. I STILL ONLY OPERATED THE XPONDER AND 1 RADIO; BUT I THOUGHT THE PROB WAS UNDER CTL. THEN UPON JUST HAVING CSG IN SIGHT; APCH COULD NOT HEAR ME WHEN I RESPONDED 'ARPT IN SIGHT.' THE CTLR ASKED ME TO IDENT IF I HEARD HIM. I DID SO; BUT HE HAD LOST MY XPONDER. I DID NOT REALIZE THIS AT FIRST AND KEPT WAITING FOR FURTHER INSTRUCTIONS. I THEN SQUAWKED 7700 AND THEN 7600; STILL NOT REALIZING THAT THE XPONDER WASN'T WORKING. I ALSO CONTINUED TO TRY TO CALL APCH. I COULD NOT AT THE MOMENT REMEMBER THE CORRECT PROC FOR A COMS FAILURE. I DECIDED (INCORRECTLY) THAT I SHOULD NOT LAND AT CSG AND HEADED FOR PIM (AN UNCTLED ARPT). I INTENDED TO CALL COLUMBUS APCH IMMEDIATELY AFTER LNDG. HOWEVER; THEY WERE ON THE PHONE CALLING ME WHEN I WALKED INTO THE TERMINAL BUILDING. THEY INFORMED ME THAT I SHOULD HAVE WATCHED FOR LIGHT SIGNALS FROM THE TWR AND THEN LANDED. I MADE 3 MISTAKES: 1) LEAVING MY HAND-HELD RADIO AT HOME; 2) BEING RUSTY ON EMER PROCS FOR COM FAILURE; 3) LETTING THE EMER SIT CLOUD MY MEMORY OF PROCS. I AM NOW IN THE PROCESS OF STUDYING AND REVIEWING THE AIM FOR ALL EMER PROCS.