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.
All the new electric Club Car golf carts use six 8 volt golf cart batteries. This provides a total of 48 volts. Here is a picture of my batteries in my newly refurbished 2006 Club Car. Other manufacturers use six 6v golf cart batteries or four 12 volt golf cart batteries.