PLT OF A C310 LOST COM DUE TO BOTH ALTERNATORS FAILING FOR DIFFERENT REASONS. PLT USED A HAND-HELD RECEIVER TO RECEIVE BY AND HAND-HELD GPS NAV RECEIVER TO CONTINUE TO DEST WHERE A SUCCESSFUL LNDG WAS MADE IN VFR CONDITIONS. ATC KEPT HIM IN RADAR CONTACT AND HEARD HIM ON SOME OCCASIONS WHEN XMITTED WITH SOME BATTERY PWR.

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SHORTLY AFTER DEPARTING MTO ON AN IFR CLRNC; I EXPERIENCED ELECTRICAL PROBS. I NOTICED A BAD ALTERNATOR; SO I SHUT EVERYTHING I COULD DOWN AND TRIED TO SELF EXCITE THE ALTERNATOR. ABOUT 1 MIN AFTER THAT I LOST THE OTHER ALTERNATOR. I TOLD CMI APCH I WAS HAVING TROUBLE; BUT BEFORE I COULD REQUEST VECTORS TO CMI I LOST TOTAL ELECTRICAL. I HAD A HAND-HELD TRANSCEIVER TO LISTEN; BUT I COULD NOT XMIT. I ALSO HAD A HAND-HELD GPS AND USED THAT TO NAV TO C77 MY DEST. I ALSO KNEW IT WAS VFR AT C77 SO I CONTINUED MY FLT N; AS I WAS CLRED. I LEFT THE ELECTRICAL OFF; ONCE IN A WHILE I WOULD TURN ON THE RADIOS AFTER LETTING THE BATTERY CHARGE; I COULD XMIT FOR ABOUT 7-10 SECONDS. SO I LET ZAU KNOW WHAT WAS GOING ON; THEY WERE HELPFUL AND HAD ME AS A PRIMARY TARGET. I HEARD THEM ON THE HAND-HELD LET ME DSND TO 3000 FT; SO I DID; BUT IT DID NOT GET ME OUT OF THE CLOUDS. THEN I LET THE BATTERY CHARGE ENOUGH TO CONTACT RFD AS I GOT ABOUT 45 MI S OF RFD; THEY THEN LET ME DOWN FURTHER; STILL IN IMC. AS I GOT ABOUT 20 MI S OF C77 I BROKE OUT INTO VFR WX. I CONTINUED AND LANDED AT C77 AND CALLED RFD TWR AND TOLD THEM I WAS ON THE GND AND SAFE. I THANKED THEM AND THEY SAID THEY FOLLOWED ME ON RADAR AND EVERYTHING WAS OK. TURNS OUT AFTER INSPECTING THE ACFT MECHS SAID ON 1 ALTERNATOR THE BELT BROKE AND THE OTHER TERMINAL BURNED OUT. TWO TOTALLY UNRELATED PROBS.