EFB batteries are offered as a lower level option than AGM batteries in terms of performance and durability. EFB technology builds on improvements to existing flood technology through the addition of Carbon additives in the sheet manufacturing process. Vehicles produced with start-stop technology have EFB type batteries. EFB batteries have a more advanced structure than AGM batteries.The main benefits of EFB technology are better charging and greater cyclic endurance when operating in a low charge state. Usage Areas: It is generally used in vehicles with start-stop feature.