By using a capacitor instead, Mazda saves weight and space and, unlike a battery, it can charge and discharge instantly without deteriorating during prolonged use.

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It listed among the possibilities a manufacturing flaw, a design defect or problems with external systems that charge and discharge the battery.

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Last month, the most exciting news was from UCLA, where a small team of researchers developed a micro-scale graphene-based supercapacitor that can charge and discharge a hundred to a thousand times faster than current batteries.

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The chemical that allows the battery to charge or discharge is held in vessels outside of the battery and it flows between the electrodes when it is time to do some work.

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