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.
Duracell manufactures group size GC2 and 230 6-volt batteries for golf carts. Both group sizes have the same footprint, are lead acid, deep cycle, refillable batteries. The difference between these two golf cart batteries is the amp hour discharge rating with the GC2 with 215aH and the 230 with 230aH.