I BELONG TO THE "EASTTEXAS CORVETTE ASSOC. OF TYLER,TX.I'VE WORKED ON C4's OVER 25 YR's + & PRESENTLY CUTTING MY TEETH ON C5's.PRESENTLY,3 OF OUR MEMBERS WITH C4's USING THE CEN-TECH 10/2/50 AMP 12V+ BATTERY CHARGER/STARTER IS EXPERIENCING DEAD BATTERIES AFTER ABOUT 4-6 MONTHS.THESE CAR'S ARE CONNECTED TO THIS CHARGER FROM 1-3 Wks AT-A-TIME SET TO THE 2 AMP CHARGE RATING. WOULD IT BE SAFE TO SAY THIS CHARGER IS CAUSING THE DEAD BATTERIES? ALSO DO U HAVE A SUGGESTION FOR A RELATIVE INEXPENSIVE BATTERY MAINTAINER? HELP!!!