4.0 rating

This Stanley FatMax jump starter ensures you can jump start your battery without requiring another vehicle. It can be used for a truck, car, motorcycle, boat, RV or tractor – it comes in extremely handy for daily or roadside emergencies.

Starting Power

With a 350 instant battery amp jump, this is a convenient, portable way to power up your vehicle, especially during winter. It features a 120 psi air compressor with easy-to-read backlit gauge to inflate tires, sport equipment and more and alternative 3.1 amp USB power sources for power outage emergencies and charging needs.

Safety Features

Just attach the clamps to the vehicle battery and if connected improperly the alarm will sound, alerting you to switch the clamps to the correct polarity before turning on the unit.

Build Quality

Despite having an array of features, it weighs just 10.6 pounds, so you can easily stash it in the vehicle. It can be the difference between tragedy and safety and at the very least between a long wait and instant relief. Having one of these in your trunk will mean piece of mind!


It comes with a 1-year limited warranty.


Batteries die due to several reasons such as extreme weather or accidentally leaving the lights on, but using this jump starter you can induce immediate life into them. Thankfully, you don’t have to rely on the old method of jumping their battery with the help of jumper cables and another vehicle. This jump starter packs the power you need, up to 700 peak amps.


There is a USB charger, 12 volt charger, and 270-degree swiveling LED. The dual charging port lets you power 2 devices at once, while the pivoting lights ensures you can work in the dark. The optional DC plug also allows you to charge Stanley’s jump starters with your vehicle’s DC port.


Thus you can see that the Stanley J7CS FatMax Jump Starter is not just a jump starter although that is the primary function. Charging them back up after use is a cinch with a household extension cord! Pull back the cover, plug in the extension cord and charge it until the LED indicator turns green.

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