AC-LE – Battery Cables / Electric Start-Up Leads These battery cables/electric start-up leads are designed for starting a 12V Cata-Dyne™ heater from a battery or other external 12V power supply. These cables are normally provided with 12V systems. http://thermaloop.net/wp-content/uploads/2015/04/AC-LE-Battery-Cables-Electric-Start-Up-Leads_catalog.xps