Portable jump-starters for cars are mysteriously little boxes, and they can be the most handy-dandy objects you keep in your vehicle. These devices are there for when everything goes wrong and your ...

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️ Editor's note: This product category requires new testing about once a year. We'll update this article with the most recent information when it's available. This article was updated in December 2025 ...

Consumer Reports no longer updates this product category and maintains it for archival purposes only. It used to be that a set of jumper cables (and an obliging fellow motorist) or a call for roadside ...

Jump-starting cars has always been a bit of a hair-raising experience. Whenever I do it, I’m a nervous wreck, paralyzed with fear that I’ll booger up the connection somehow and blow up both cars in ...