How to Use a Car Battery Jump Starter?

You’re enjoying driving your car. Meanwhile, the car stops and won’t start! This causes a dead battery. Like this emergency case, jumping a start is a good idea. In that sense, keeping a jump starter kit with you could be a serious necessity to defeat emergency starting issues! But if you don’t know how to use a car battery jump starter, then Whether or not the car has a starter is meaningless. 

Using a car battery jump starter is literally the following of some mechanical steps. 

  • Make sure the jumper box is in an off position.
  • Connect the jumper cable to a positive terminal of a battery.
  • Connect the black cable to the negative terminal of the battery.
  • Turn on the jumper box & start the car.

This is the way to use a portable jumper box to jump start a car. Let’s dive into more details with other alternative methods and learn the safest way! 

What is a car jump starter?

A car jump starter is a multifunctional and portable battery device used to jump start a car. It mainly provides enough amperes over a short period and boosts the discharge battery of a car.  

Jump starters function as jumper cables to recharge a dead battery but don’t require an additional vehicle. That means you can easily use this device in an emergency case. 

It is inexpensive and features onboard safety lights, a USB connection port, and AC outlets. So, besides starting a car, this multifunctional device is also used for charging phones, digital devices, and outdoor lighting. 

How Do Jump Starters Work?

How Do Jump Starters Work

A car jump starter uses lead-acid or lithium-ion batteries to power a dead battery. 

When your car doesn’t start with a dead battery, you have to connect the jump starter or portable battery device to the car’s dead battery. 

The portable battery will transfer the power by instantaneous high current & high voltage to the dead battery. This power is enough to crank the engine and start the vehicle. Once the engine is on, the alternator recharges the dead battery. 

Is It safe to Jump-Start a Car With a Jump Box?

Yes, it is safe to jump-start a car with a jump box if you connect it to the battery correctly! You need to follow the safety precautions also.

A very small mistake can cause an explosion or damage the battery or almost the vehicle! So, of course, there’s a risk. You have to follow the instructions to prevent unwanted explosions or firing safely.

Like, if you mistakenly connect the negative cables on the negative battery terminal first, then there’ll be sparks and the battery can explode. Serious injuries can happen with a simple mistake.

Sometimes, the dead battery can leak explosive gas, which is also dangerous for connecting jump boxes. 

Another point, you need to locate the jump box on the ground or safely where it’s far from the cooling fan, engine pulleys or serpentine belt.

So, all you need to do is follow the safety precautions and instructions while connecting the jump box to the battery. It’ll be safe!!

How to jump start a car battery? (With a Jumper cable)

How to jump start a car battery With a Jumper cable

The most traditional way to jump start a car battery is by using jumper cables. Here, you need an additional vehicle that has a good battery charge. 

Let’s know the step-by-step instruction to jump-start a car safely-

Step 1: Place the car at a suitable distance

Locate both cars at a distance, one that runs and one that has a bad battery. So you can attach the cables easily. Make sure they don’t touch each other. 

Take off the ignition keys of both cars.

Step 2: Identify the positive & negative terminals of the battery

Now, see where the battery is located on both vehicles and identify the positive and negative terminals of the batteries of both cars as well.

Step 3: Attach jumper cables to a dead battery car

Take jumper cables that have both positive and negative terminals. Go to a dead battery car! Here, you’ll attach the positive side (Red) to a dead battery’s positive terminal (Red). 

Tips: Wiggle it a little to ensure a good connection of cables to a terminal.

 Take the negative side (Black) of the cables and attach any plastic to it.

Step 4: Attach both cables to a good battery car

Now, go to the car, which has a good battery.  Connect the red jumper cable to the positive terminal and the black one to the negative terminal of a car as well.

Step 5: Find the grounding for black cables

Back to the bad car’s battery and take off the black cable from the plastic. Check the manual if there’s any ground spot away from the battery. 

If you can’t find out, check for a suitable bare piece of metal that isn’t moving or attached to an electric component. 

Well, find out strut power for good grounding. It also has a good distance from the battery, so there’s no risk of a spark or explosion. Clamp the negative cable to the strut power. 

Tips: Make sure the cables are far away from the cooling fan or engine pulleys.

Step 6: Turn on the engine of a good battery car

Now, start the engine of a good battery car for about 2 minutes. 

Step 7: Start your bad battery car

Try to start your car. If it works, then go to the battery connection of your bad battery car.  

Step 8: Remove the connection of the bad battery

First, take off the negative terminal cable and then remove the positive terminal. 

Separate them and make sure they don’t touch each other.

Step 9: Remove the connection of the good battery

Let’s take off both the positive and negative terminals of the cable from the battery. 

Now, sit for at least 5 minutes as the alternator charges the battery. Then, start your car. 

Cool!!! Does it start? Hopefully, Yes. 

How to use a car battery jump starter safely?

The more you need to do is follow the proper instructions of the guideline. You can use a car battery jump starter safely by following some important things, which are listed below-

  • Before using jumper cables, make sure the vehicle’s ignition key is off.
  • Don’t mess with connecting the cable with a different terminal of the battery.
  • Never attach the negative terminal at first. 
  • Make sure the connections are far away from the cooling fan or serpentine belt.

Can you charge a battery with a portable jump starter?

Can you charge a battery with a portable jump starter

Yes, you can charge a battery with a portable jump starter.  When it’s connected to a dead battery of a car, there’s electricity directly flowing from the portable jump starter. 

After that, once you disconnect the jumper box from the battery, the engine will run and the battery will charge. 

But if the battery is fully dead a,e, it has less voltage than 2 V,  it’s very difficult to charge. Or, it’ll charge for driving a little distance or restarting the engine for a few minutes. 

How to use a portable car battery jump starter?

Well, a portable jump box is very easy and convenient to use.  You don’t have to take an additional vehicle in this way to recharge a bad battery. Let’s figure out the step-by-step guideline –

  • First, make sure that the jumper box is in an off position.
  • Take the red jumper cable and connect it to a positive terminal of a bad battery.
  • Take the black cable and connect it to the negative terminal of a bad battery.
  • Turn on the jumper box and start the car.
  • Turn off the jumper box and disconnect the cables.

Can you damage a car by jump starting?

Probably, it may damage a car’s electric system when you don’t follow the proper instructions or make any mistakes while jumping a start.

If the vehicles don’t start after connecting jumper cables, then it can damage the battery as well. 

However, if your starter jumper doesn’t feature spike protection, it can cause an explosion. Because, while the battery starts leaking, there’s a spark on the battery.  

When to not jump start a car battery?

If the battery is fully cracked, damaged, or leaky, then you should not jump start a car battery. Again, if the fluid inside the battery gets frozen, you shouldn’t jump start a car because it can cause an explosion.  

Don’t jump-start a car when it’s raining or very cold outside. There’s a high chance of damaging the electric connection of a car.

What not to do when jump starting a car?

While jump starting a car, always carefully follow the steps as given in the instructions. You need to do several steps like carefully-

  • Never add black cable on a negative terminal while using jumper cables. Always find a suitable ground for it.
  • Don’t ever touch both cables after taking off the battery.
  • Don’t jump start a car when the battery is old, worn or cracked.
  • Don’t attach the black cable first to the battery.

Can you use a jump starter on a dead battery?

Using a jump start on a dead battery isn’t a good idea. It won’t work with a 0-volt battery at all. 

As we know, jump-starting a car isn’t about recharging a battery. It only supplies power to the motor and cranks the engine. When the engine starts,  the alternator charges the battery.  So, it’s not fully charging the depleted battery. 

When you want to jump the starter on a dead battery,  the alternator may also break down. They’ll require expensive repairs.  


How long does a jump starter take to charge a car battery?

It usually takes 5-6 hours to charge a car battery with a lithium-based or lead-acid battery jump starter. Also, it takes only 3 minutes while you are using a supercapacitor jump starter.

How long does a jump-start last?

Manufacturers guarantee up to 2-3 years lifespan of a jump starter, but it may last longer. Again, depending on the uses, it may cause damage and hence you may need to replace it before the warranty.

How do you know when a jump starter is fully charged?

After fully charged, a light indicator on a jump starter will say itself. Check the manufacturer’s instructions for the specification of colors. 

Most jump starters have an orange or red color which usually indicates that the jump starter is charging. The green color indicates it is fully charged.

How long should it take to jump-start the car?

It takes basically 5-6 minutes to jump start a car. Sometimes, if the battery has depleted, it can take 30 minutes.

How many volts is a jump-start?

The car needs at least 12v for a jump start. At the operation time, it should be between 13.7-14.7 v.