The Varta A9 battery is constructed using innovative AGM (Absorbent Glass Mat) technology, which is used in vehicles equipped with a start-stop system. Because of this, the A9 battery is able to offer exceptional resistance to cyclic charging and discharging processes, which is crucial in such vehicles. Its capacity is 50 Ah, and the maximum starting current is 540 amperes. The pole layout is 0 – the positive is on the right side.