When Westrock Battery opened for business in 1951, the cars were heavier, the fins were bigger, and remote starters were the stuff of spy novels. Over the ensuing six decades, however, the business kept up with the ever-accelerating progress of automotive technology, stocking more and more powerful car batteries as well as power sources for boats, heavy equipment, and laptop computers. Today, the shop has more than 100,000 items in stock, an inventory that includes all manner of battery power plus chargers, starters, wireless phones, and solar energy systems.