Stanley J309 Jump Starter (300 amp)
While many of the more budget-friendly units forgo features that can be important for both safety and utility, the Stanley J309 offers a good blend of portability, features, and affordable pricing. This lightweight jump starter is compact and portable, while being rated at a peak of 600 amps and 300 cranking amps. Although this might not be ideal for jump starting the completely dead battery of a much larger vehicle, it should have no trouble getting most standard cars/trucks started.
The J309 includes a reverse polarity alarm, on/off switch, and bright built-in light which all contribute to better safety. It also includes some unique connectivity with a USB outlet as well as the more standard cigarette lighter-style outlet for charging and power accessories. Its versatility and ease-of-use make the Stanley J309 a solid choice.