Do Not Directly Connect the Negative Cable To The Weak Battery

Q: I’ve always jumped a car battery by connecting jumper cables directly from the positive and negative terminals on the good battery to the corresponding terminals on the other. However, I’ve recently been told not to directly connect the negative cable to the weak battery. Why not?

A: Technically, if you connect the negative cable to the negative terminal of the weak battery, the battery terminal could spark and ignite hydrogen gas surrounding the battery. For the sake of user safety, books and magazines such as Extreme How-To suggest you clamp the negative cable to the negative terminal of the good battery, and then clamp the other end of the negative cable to metal part of the automobile engine, such as the block, a bracket or bolt-head.

Hot Product

ThermoClip Hidden Deck Fastener
Introducing ThermoClip™ Hidden Deck Fasteners For Thermally Modified Wood

Industry experts predict that thermally modified wood will become a standard choice for high-quality exterior applications, reshaping the decking (and siding) market landscape. As an industry-transforming option, it caters to the needs of homeowners, builders, and designers seeking high-performance, low maintenance, and eco-friendly alternatives for exterior applications. Recognizing this market evolution, DeckWise® has extensively studied […]