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.
Electric batteries for golf carts come as sets in different voltage. The two most common are 36 volts or 48 volts. have an electric Club Car DS that is 25 years old. It has had several sets of batteries replaced. The older model golf carts are typically 36 volt and have six 6 volt golf car batteries. The power and longevity of the 6 volt battery has served me well these 14 years. Playing 36 holes of golf on one charge is no problem. Or using it to get across town. The total golf cart voltage of 36 provides plenty of power for going uphills and a long enough charge to get us any where we need to go.