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.
How long will an electric car battery last? The lithium-ion battery pack in the Tesla Roadster is projected to have a lifespan of about 5 years or 100,000 miles. At the end of that time the pack will need to be replaced, at a cost of approximately $10,000. Sure, that's expensive, but the Roadster itself will cost almost $100,000, which makes the cost of the battery pack seem affordable.