The super-capacitor maker CAP-XX is targeting a partnership to commercialise a device for stop-start applications in cars and lorries.CAP-XX's "super-capacitor module" removes the dependence on lead-acid batteries for starting the engine. The company claims testing has shown its invention reduces wear on the battery caused by getting a vehicle going, which can reduce the battery's life to as little as 18 months.CAP-XX also says the device performs better in cold weather than the battery on its own, while also being an effective "energy store" for regenerative braking systems.CAP-XX's stock had risen 13.3% by 10.58am. Over the last year the company's shares have gained 71.5%.BS