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 batteries of much larger vehicles, 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 - all contributing 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.