A TURBO CESSNA 210 PLT RPTS THAT HE HAD AN ACFT EQUIP PROB BATTERY FAILURE CAUSING HIM TO BE A NORDO ACFT. TRAINING IN PROGRESS BIENNIAL FLT REVIEW.

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THE FLT HAD INCLUDED SEVERAL LNDG GEAR RETRACTIONS AND EXTENSIONS; ALL OF THE AIRPLANE'S EXTERIOR LIGHTS; AND ELECTRONIC EQUIP WERE ON. AFTER LISTENING TO ATIS; I CONTACTED ARB TWR ABOUT 10 NM SW IN PREPARATION FOR LNDG. ABOUT THAT TIME I NOTICED THE DME HAD STOPPED WORKING. WHILE CHKING THAT OUT; I NOTICED THAT THE ALTERNATOR CIRCUIT BREAKER HAD 'POPPED.' I RPTED TO ARB TWR THAT WE HAD LOST OUR ALTERNATOR; WHICH THEY ACKNOWLEDGED; AND ASKED IF WE NEEDED ASSISTANCE. I MOVED THE LNDG GEAR SWITCH TO 'DOWN;' THE GEAR CAME DOWN AND APPEARED LOCKED. HOWEVER; ALL INDICATIONS OF ELECTRICAL PWR WERE MISSING. I ATTEMPTED TO LOWER THE FLAPS FOR LNDG; BUT THEY DID NOT RESPOND PROPERLY. THERE WAS NO INDICATION OF ELECTRICAL FIRE; SO I RESET THE ALTERNATOR CIRCUIT BREAKER. THE ALTERNATOR DID NOT RESPOND. BY THAT TIME I WAS ON SHORT FINAL; WITH NO AVAILABLE ELECTRICAL PWR. THE LNDG WAS UNEVENTFUL. AFTER TAXIING TO THE T-HANGAR; I HEARD THE LNDG GEAR MOTOR TRYING TO RUN; BUT NOT HAVING ENOUGH PWR TO DO SO. AFTER EXITING THE AIRPLANE; I NOTICED THE LNDG GEAR DOORS WERE STILL OPEN. SINCE I HAD NOT BEEN ABLE TO COMMUNICATE WITH TWR SINCE ON FINAL; I TELEPHONED THEM TO DISCUSS THE EVENT. THEY WERE VERY HELPFUL; AND SAID THERE WAS NOTHING FURTHER I NEED TO DO ABOUT IT WITH THEM. AFTER CHARGING THE BATTERY; A VERY CAREFUL CHK OF THE AIRPLANE AND ITS SYS REVEALED NO PROBS. AS BEST I CAN TELL; I OVERLOADED THE ELECTRICAL SYS WHICH CAUSED THE ALTERNATOR CIRCUIT BREAKER TO 'POP.' I DID NOT NOTICE THIS HAD HAPPENED UNTIL THE BATTERY HAD BEEN RUN DOWN SUCH THAT IT COULD NOT SUPPLY ENERGIZING PWR TO THE ALTERNATOR. WHAT LITTLE PWR THERE WAS BY THEN WAS BEING DRAINED BY THE GEAR MOTOR UNSUCCESSFULLY TRYING TO CLOSE THE GEAR DOORS. THUS I HAD NO AVAILABLE ELECTRICAL PWR. ACTIONS I INTEND TO TAKE AS A RESULT OF THIS EXPERIENCE: DON'T OVERLOAD THE ELECTRICAL SYS; INCLUDE THE ALTERNATOR READOUTS IN MY INST SCAN; ALWAYS; ALWAYS HAVE AT LEAST ONE GOOD PORTABLE NAV-COM RADIO ABOARD; AND INVESTIGATE AUX BATTERY POSSIBILITIES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS FLYING A TURBO CESSNA 210 ON A BIENNIAL FLT REVIEW WITH AN INSTRUCTOR ABOARD. HE WAS DOING MULTIPLE APCHS WITH MANY OPS OF THE LNDG GEAR. A NEW BATTERY HAS FIXED THE PROB. INITIALLY HE CHARGED THE BATTERY; BUT; WHEN IT WOULD NOT HOLD A CHARGE; HE REPLACED IT. THE ACFT IS A 1973 MODEL. THE RPTR HAS FLOWN IT MORE THAN 1000 HRS.