Panasonic N-Q105/A4 (Q85) 12V 655CCA EFB Start/Stop Automotive Battery The perfect replacement for a Q-85 battery, same size but nearly 25% more powerful! Ideal for modern vehicles fitted with ISS (Idle-Stop-Start), e.g. the Mazda CX3 / CX5 etc, this battery comes in both polarities, just check which side the positive (+) terminal is located matches your vehicle (or use the Registration Search tool on our home page). Panasonic have been the No.1 Factory-fitted Battery for leading brands such as Toyota, Mazda, Nissan and Subaru for many years. These batteries are built in Japan to the highest specification and under the most rigorous quality control, to keep your car operating reliably in hot conditions and heavy traffic. The Blue Case model is the Top Specification possible, and it exceeds the perforance of the excellent standard fit grey case models. Replaces Q-85 (nearly 25% more powerful in the same size!) These batteries are able to survive and operate in a lower state of charge than regular lead acid batteries, and are suited to Stop/Start vehicles that don't require the deep cycling of an AGM battery. These batteries often have graphene on the negative plate to enhance the cranking performance and guard against plate growth. They support a higher number of engine starts than conventional batteries and survive better when left unused for extended periods of time. * * ALL batteries, including EFB and AGM, don't like being left in a partial state of charge.