How To Use A Stanley Fatmax Jumpstarter [Step By Step Guide]?

Did you just purchase a Stanley Fatmax jump-starter, or perhaps you’re contemplating whether to buy one? And do you want to know how to use it in case you need to jump-start your car? You’ve come to the right place, for we have researched this question, and we have the answer for you.

Here is a summary of the steps on how to use your Stanley Fatmax jump starter.

  1. Check the power level of your Fatmax.
  2. Connect the jump starter cables from the Fatmax to your car battery.
  3. Turn on the Fatmax.
  4. Start the engine of your car.

Let’s talk more about jump-starting your car in the succeeding sections. Learn more about the other features of your Stanley Fatmax in the sections below.

Read on!

Road assistant worker in towing service trying to start car engine with jump starter and energy station with air compressor. Roadside assistance concept. - How To Use A Stanley Fatmax Jumpstarter [Step By Step Guide]?

How do cars start the engine?

Everyone knows that car batteries are responsible for starting a car with an internal combustion engine. But what really happens under the hood of your car when you turn the key inside the ignition cylinder or when you push the Start/Stop button?

Car start stop system with finger pressing the button, horizontal image

Very near the engine of your car is a small yet powerful electronic motor. This is called the starter motor. Starter motors can be pneumatic or hydraulic as well, although these are less common.

Inside the starter motor is an electromagnet. This electromagnet is at the heart of the solenoid that needs only a small current to activate the electromagnet.

When you turn the ignition switch or press the ignition button, the circuit becomes complete, and a small electrical current flows from the battery to the solenoid.

Once the electrical current reaches the solenoid, it activates the electromagnet. The electromagnetic energy slides the plunger along its coils.

The movement of the plunger accomplishes two things at the same time.

First, the front of the plunger pulls at one side of a lever. This lever pushes the pinion to mesh with the flywheel of the engine.

The flywheel is a large gear that can conserve angular momentum, storing rotational energy. It rotates the crankshaft to initiate the combustion inside the engine.

The second effect of the plunger’s movement is the completion of another circuit that requires a larger electrical current. Once this circuit is complete, a surge of electrical energy travels from the car battery to the starter motor.

The starter motor rotates rapidly at the same time that the pinion meshes with the flywheel.

However, if the car battery doesn’t have a sufficient electrical charge, it will not be able to provide the starter motor with the energy that it needs to rotate the flywheel and initiate combustion.

Feedback Loop

Internal combustion engines are feedback systems. What this means is that once the cycle of combustion starts, each stage in the cycle produces enough inertial energy to kick off the next stage. Each stage completes what it needs to do and seamlessly continues to the next stage using this inertial energy.

The only problem with feedback systems is that you need an external force to start the loop.

For internal combustion engines, this is where starter motors come in.

The Stanley Car Jump Starter

With the rise in compact battery jump starters, it can be a surprise to see a car battery jump starter like the Stanley Fatmax.

The Stanley Fatmax is part of the Fatmax line of products. The Fatmax family of products ranges from hammers to hoses.

Stanley’s jump starter is a power station that has several functions. These functions justify the bulky frame and heavy body.

It can provide up to 1,200 peak amps and 500 amps. It has its own cables and heavy-duty clamps. Additionally, it can jumpstart engines that have up to eight cylinders.

On the downside, its built-in cables are barely two feet long. Place the jump starter on top of the car battery to have enough cable length.

Fortunately, if you get the cables wrong, it will warn you with a chime to let you know that you should swap the cables.

The flat and bulky frame of Stanley’s jump starter is justified because of its built-in air compressor. It can produce up to 120 PSI. The air compressor is enough to restore the tire pressure of your car.

Set the tire pressure that you need, and it will start filling your tire with air until it reaches the target pressure. It automatically stops pumping once it reaches the target pressure.

The Stanley jump starter also has a utility to check the state of the alternator of your car. It checks the rate of charge from the alternator to determine its health.

To charge the jump starter, use any 3-prong household extension cord and connect it to the covered charging port of the jump starter.

It also has an auto-off feature that turns itself off automatically if it is idle for more than 10 seconds.

car battery on charge in winter, breakdown

How to jump-start your car using the Stanley Fatmax Powerit jump starter?

Here are the complete steps to jump-start your car using the Stanley Fatmax Powerit jump starter. If for some reason, the cables of the Powerit jump starter are not long enough, you can connect longer jump start cables to it.

Preparing Your Car For Jump Starting

  1. Make sure that all the devices (anything that consumes electrical energy) inside your car are off.
  2. Unplug all USB devices. Remove any devices that are drawing power from your car. This includes devices that are on the auxiliary power port.
  3. Activate the parking brake.
  4. Open the hood of your car and locate the car battery.
  5. Look for a level area where you can set the jump starter. It is heavy, so placing it in a place where it will not slide down when your car’s engine starts to vibrate is ideal. Set the jump starter on the engine bay.

Connecting The Stanley Jump Starter

Accumulator charging. Hands and terminal. Car repair. Service station.

  1. Check the charge level of your Stanley jump starter and make sure that it has enough charge to jump-start your car. If it doesn’t have enough charge, it will not be able to start your car. Always store your jump starter power packs fully charged.
  2. Connect the red cable from the jump starter to the positive terminal of your car battery. There is a positive marking on the positive terminal of your car battery. Additionally, some car battery manufacturers color the positive terminal of the battery with a red plastic or rubber coat.
    • If the cable is not long enough, connect a red jump start cable to the end of the red cable from the Stanley jump starter.
  1. Take the black cable from the Stanley jump starter and connect it to any bare metal on your car’s body or frame.
    • If the black cable is not long enough, connect a black jump starter cable to the black cable from the jump starter and connect the other end of the cable to the bare metal on your car’s frame.

Energizer Jumper Cables for Car Battery are available on Amazon through this link.

Starting Your Car And Finishing Up

  1. Turn the bright red knob in front of the Stanley jump starter to the “On” position.
    • There will be a sudden drop in the available voltage on the digital display of the jump starter when you turn it on. This is normal.
  1. Get inside your car and start the engine.
    • It might take one or two attempts to start your car, depending on how bad your car battery’s state is.
  1. Once the engine starts, turn off the red jump-start dial on your Stanley jump starter.
  2. Disconnect the black cable from your car’s frame first.
  3. Disconnect the red cable from the car battery’s positive terminal.

How to use the Stanley jump starter to check the alternator?

Accumulator charging. Hands and terminals. Car repair. Service station.

Starting your car takes up a lot of electrical energy. Your car battery will only be able to do a finite number of starts before it becomes too weak to start the engine.

Moreover, keeping the battery at less than full charge will cause permanent damage to it.

Once the engine starts running, the alternator takes over supplying the electrical energy that your car needs. Additionally, the alternator will start charging the car battery to prepare it for the next time that it will need to start your car.

Thus, it is a good idea to keep your alternator in top shape. When your car battery fails to start your car, you should also check the alternator. This will tell you if your battery did not get the charge that it needs while your car is running.

Fortunately, the Stanley jump starter lets you check the alternator.

Here are the simple steps to do it.

  1. After your car starts, turn off the bright red dial on the front face of the Stanley jump starter.
  2. Leave the cables connected to the car battery after turning off the jump starter.
  3. Let your car idle for a minute or two.
  4. After letting your car idle, press the “Alternator Check” button on the Stanley jump starter.
    • The display will change and show a small icon of three pulleys rolling.
    • It will take 10 to 15 seconds to complete the alternator check.
    • The jump starter will then display a report on whether the alternator is ok or not.
  1. Press the “Alternator Check” button to return to the normal display.


The Stanley Fatmax Powerit jump starter may be larger than standard jump starter packs. However, it can also inflate your tires and check the health of your alternator.

If you found this article interesting, why not check the two articles below too:

Can A Car Battery Have Good Voltage And Still Be Bad?

Can Your Radio Drain The Car Battery?

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