BluFlex™ Battery Management System All our 12v starting batteries and racing packs feature our proprietary BluFlex™ Battery Management System (BMS). Standalone BMS units are available for electric conversion OEM's and enthusiasts seeking a flexible and reliable way to dramatically improves lithium pack cycle life. Contact us today to discover the benefits of the BluFlex™ BMS for your application See our Products page for off the shelf products and our new UltimateRace 12v Starting Battery coming Summer 2011