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Skeleton Technologies Group OU is working on supercapacitors, light-weight and long-life components that can distribute intensive bursts of power. These may help eliminate lead-acid batteries, a piece of technology invented in 1859 that still lurks under the hoods of Teslas in addition to the main lithium-ion power source.

Only one domestic model, the Tesla Model 3, was named tops in its price category in the annual Consumer Reports top picks list, an influential designation for shoppers looking for new cars. And no U.S. brands, including Tesla, were ranked in the Top 10.

These tools are probably not worth it for the typical car owner. Lower-priced units are not worth the money; upper-end tools have features most will never use. They basically provide readouts of trouble codes, the problems triggering the check engine light.

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