Isbell was mayor of Pasadena from 1981-1985 and from 1993-2001 when he reached term limits. He was returned to the mayor's office in January, 2008 for an unexpired term and subsequently was re-elected to a full term in May, 2009.
These are nicads though, probably your gold cart is lead acid. If you find a good cheap local source of deep cycle 6 volt batteries, let me know. I'd say 7 years is a pretty good run for golf cart batteries, esp. if you ran them down several times. You'll do even better if you top them off at 80% or more.
The best golf cart battery is going to be the one that has the right voltage for your cart and provides years of long lasting charges. All of the new electric Club Car golf carts use six 8 volt golf cart batteries. This provides a total of 48 volts. Other manufacturers use six 6v golf cart batteries or four 12 volt golf cart batteries. The older models like mine, which is a 1987 Club Car use a 6 volt golf cart battery. The golf cart battery box holds a battery pack of 6.