Are reviews for Costco 6V golf cart batteries generally positive?

Reviews for Costco 6V golf cart batteries are mixed. Customers find that while this is an affordable battery, dead cells and other factory defects are somewhat common. Despite being sold under the Costco name, this same battery is available under many different brand names.

The Costco 6V golf cart battery is not manufactured by Costco but by dedicated battery manufacturer Johnson Control. Johnson Control does not sell its batteries directly to consumers but to other battery companies who then sell the batteries under their own company names. The exact same battery as the Costco 6V golf cart battery is sold by Energizer and Interstate under the GC2 model name.