Exide EK800 Battery 12v 80ah 800A 315x175x190mm. The AGM car battery EK800 is ideal for vehicles equipped with a start-stop system and modern regenerative braking, and it is approved by the car manufacturer. The acid is securely contained in a glass mat, and the unique carbon additive makes this battery extremely powerful and durable. Replaces Varta F21 Silver Dynamic AGM. Optimized for operation in partial state of charge. Exide Technologies is one of the world's leading manufacturers of lead batteries. As an original equipment manufacturer for many automotive brands and a partner in motorsport, the name Exide is synonymous with innovative and powerful technology.