Stanley J309 Jump Starter Review

Stanley J309 300 Amp Jump Starter Review

The Stanley J309 is a budget priced jump starter with loads of high end features. It includes a variety of power connections including a 12V DC connection so you can easily power up small electronic devices.

Stanley J309 300 Amp Jump Starter

Ease of Use

Various power connections including 12V DC port.


600 Peak Amps


$31.98 to $51.99 in April 2017 


A built-in reverse polarity indicator means cables are connected correctly.

Summary: The Stanley J309 300 Amp Jump Starter is a great jump starter to have in the trunk of your car or in your garage because of its great features and capability to deliver.

Not only it can jump start your car whenever you need it, but it also offers you some peace of mind knowing that you will never have problems starting your car.

Features and Benefits

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Stanley J309The quality and the features of this device are what make the Stanley J309 300 Amp Jump Starter a practical buy. It is ideal to have it in the trunk of your car or to keep it in your garage, ready to use when needed.

One of the great features of this jump starter is the fact that it can deliver 300 amps instant starting power and that it has 600 peak battery amps. Therefore, you can be sure that, when the battery of your car is dead, this device will be able to bring it back to life in no time.

In order to provide quality to its customers, the device is designed with a tough and durable housing for a long and lasting usage. Moreover, the clams of the jump starter are heavy duty and are made out of metal for a safe and steady connection to the battery of the car. To make things better, the device also features an audible and visual reverse alarm.

When it comes to recharging the unit, there’s no hassle involved. All you need is a standard household extension cord to connect the device thanks to its built-in 120 V AC charger. Furthermore, in case of need, the jump starter also features high powered LED emergency lights that are capable of rotating 270 degrees.

Customer Reviews

The great features of the Stanley J309 300 Amp Jump Starter have brought it many positive reviews from its users. These are content with how the jump starter works. Some users even talk about the ease of use.

The Stanley J309 300 Amp Jump Starter has received over 2200 customer reviews on Amazon and has been given a impressive customer score of 4.3 stars out of 5.0.

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  • The unit compact and portable.
  • For a budget jump starter you get lots of power.
  • Simple to use.
  • Comes with an LED light, so you can operate it during the night.
  • Easy to understand the instructions that come with the charger.
  • Includes a USB port so you can charge various electronic accessories.
  • A charge cord is not supplied.

Frequently asked questions

Is there an On/Of switch?

Why is there a need for the reverse polarity light?

How long does the charge last?

How do you charge the unit?


If your on a tight budget then the Stanley J309 600 Amp Jump Starter might be what your looking for as it has extra features you would normally get in mid or top end units.

It can offer you peace of mind when you need a unit that can deliver power to your car’s battery during the winter or any season. The jump starter delivers 600 peak amps which should be enough to jump a car.

Extra features include USB and 12V DC power ports that allow you to power up small electronic devices. And it also include a LED lamp when your working in poor light conditions.

The Stanley J309 is a budget jump starter that can be found price at between $31- $52 at the time of writing this review. As prices change frequently click here for the latest price on Amazon.


  • 300 Cranking amps
  • 600 peak battery amps
  • Tough and durable housing
  • Heavy duty clams
  • Audible and visual reverse polarity alarm
  • 12-volt and USB outlets
  • High powered LED emergency lights

You may also be interested in reading a full review for the Stanley J509 500 Amp Jump Starter


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