How To Start a Hybrid Car With Dead Battery? Guide Of 2023

Hybrid cars have gained significant popularity in recent years due to their eco-friendly nature and improved fuel efficiency. These vehicles combine a traditional gasoline engine with an electric motor, providing a more sustainable and efficient driving experience. However, like any other vehicle, hybrid cars can encounter issues, such as a dead battery. Know how to start a hybrid car with dead battery below.

What is a Hybrid Car?

A hybrid car is a vehicle that combines two different power sources: an internal combustion engine (usually gasoline-powered) and an electric motor. These two power sources work together to improve fuel efficiency and reduce emissions. The electric motor assists the gasoline engine, particularly during low-speed or stop-and-go driving, which is when conventional vehicles are less efficient.

How Does a Hybrid Car Battery Work?

Hybrid cars are like superheroes in the car world. They can use both electricity and gasoline to move. To do this, they have two special types of batteries: the High Voltage Battery and the 12-Volt Battery. Let's take a closer look at how these batteries work in simple terms.

The High Voltage Battery: The Heart of the Electric System

Think of the high voltage battery as the superpower heart of a hybrid car. It's the battery that makes the electric part of the car work. Here's how it does its magic:

Saving Energy When You Brake: When you press the brakes in a hybrid car, something cool happens. Instead of wasting all the energy as heat, like in regular cars, the hybrid car turns it into electricity. This electricity goes into the high voltage battery for safekeeping.

Boosting Power When You Need It: When you want to go faster or need extra oomph to move, the high voltage battery comes to the rescue. It gives electricity to a special motor, which helps the car go. This is what makes hybrid cars save gas when you're stuck in traffic.

Going All-Electric: Hybrid cars can also go fully electric for short trips. In this mode, they use the high voltage battery to power the car without using any gas. That's why they're so quiet when you see them driving slowly in parking lots.

Recharging the Battery: The high voltage battery isn't a one-time thing. It can be recharged. When you drive, any extra electricity made by the gas engine can be used to fill up the high voltage battery. Even when you're cruising on the highway, the engine can charge it directly, making sure you use energy wisely.

The 12-Volt Battery: Power for Accessories and More

Now, let's meet the 12-volt battery. It's like the helper battery in your car, but it has a unique job in a hybrid:

Powering Your Car's Extras: Just like in regular cars, the 12-volt battery makes sure things like your lights, air conditioning, and radio work. Without it, your car would feel pretty gloomy inside.

Taking Care of the Car's Brain: Cars these days are pretty smart, thanks to computers. The 12-volt battery keeps all these computers running smoothly. They watch over the engine, the battery, and make sure your car runs as efficiently as possible.

Getting the Gas Engine Going: When you start your hybrid car, it doesn't need a big, clunky starter motor like regular cars. It uses the 12-volt battery to start up the gas engine. Once the engine is running, it can make electricity to recharge the high voltage battery and move the car.

Making Sure Everything's Ready: When you turn the key or push the button to start your hybrid car, the 12-volt battery is there to make sure everything is ready to go. It helps all the different parts of the car talk to each other so that everything works smoothly.

How To Start a Hybrid Car with Dead Battery? Step by Step

You should know the answer to “how to start a hybrid car with dead battery?” Hybrid cars are special because they use both gasoline and electricity to run. But sometimes, the battery in these cars can die, just like your regular car. This guide will show you the easy way to start a hybrid car when the battery is dead.

Step 1: Find the Battery

Hybrid cars have two batteries, but we only care about the small one, called the 12-volt battery. It usually lives under the hood of the car.

How To Start a Hybrid Car with Dead Battery

In your car's book of rules (the owner's manual), it will tell you where to find special points for jumpstarting your car. These points might have symbols like "plus," "minus," or "J" on them.

Step 2: Get Another Car Ready

If you have another car that can help, that's great. Make sure it's turned off, and the two cars are not touching each other. We'll use this car to give your hybrid a boost.

Now, we need some special cables called jumper cables. One end of the red cable goes on the plus side of your dead 12-volt battery. The other end goes on the plus side of the other car's battery.

Step 3: Connect the Black Cable

Next, take the black cable. Don't attach it to the dead battery; that's important. Instead, find a piece of metal in your hybrid car that isn't painted. Attach the other end of the black cable to the minus side of the other car's battery.

Now, start the other car (not your hybrid, the one with the good battery) and let it run for a little while. This will give some power to your dead battery.

Step 4: Try to Start Your Hybrid

After waiting for a bit, try to start your hybrid car. If it starts, let it run for a few more minutes to help the 12-volt battery charge up.

Keep an eye on your hybrid's dashboard for any strange lights or messages. The big battery in your hybrid might need more time to charge up fully. So, drive around a bit to help it.

Step 5: Prevent Dead Batteries

To stop your hybrid battery from dying again, try these things:

  • Make sure your 12-volt battery gets checked and changed when needed, just like your regular car.
  • Don't leave your hybrid just sitting there for a long time, as it can drain the 12-volt battery.
  • Driving your hybrid often keeps the big battery happy and charged.
  • Really hot or cold weather can make the battery not work well. If you can, keep your hybrid in a place with good temperature control.

Why Might a Hybrid Car Battery Die?

A hybrid car's battery can die for various reasons, including:

1-Age and Wear: Like all batteries, hybrid car batteries have a limited lifespan and will eventually lose their ability to hold a charge.

2-Extreme Temperatures: Extreme cold or hot weather can affect battery performance. Extremely low temperatures can reduce the battery's ability to deliver power, while high temperatures can cause it to degrade faster.

3-Inactivity: If a hybrid car is left unused for an extended period, its 12-volt battery can drain, making it difficult to start the vehicle.

4-Electrical Issues: Faulty wiring or other electrical problems can drain the high voltage battery. Now you know - how to start a hybrid car with dead battery?

What are the Safety Precautions to Take When Starting a Hybrid Car with a Dead Battery?

Safety should always be your top priority when dealing with a dead battery in a hybrid car. Here are some essential safety precautions to follow:

1-Park in a Safe Location: Before attempting to jump-start your hybrid car, ensure you are in a safe location. Park on a level surface away from traffic and any potential hazards.

Safety Precautions to Take When Starting a Hybrid Car with a Dead Battery

2-Turn Off Ignition and Engage Parking Brake: Turn off the ignition of both the dead hybrid car and the donor car, and engage the parking brake on both vehicles.

3-Locate Jump Start Terminals: Hybrid cars typically have jump start terminals under the hood, but they may also be located in the trunk or under the rear seat. Consult your car's manual for specific instructions.

4-Use Correct Jumper Cables: Ensure you have high-quality jumper cables. Connect the positive (red) cable to the positive terminal of the dead battery and the positive terminal of the donor car. Then, connect the negative (black) cable to the negative terminal of the donor car. Never connect the negative cable directly to the dead battery.

5-Start the Donor Car: Start the donor car's engine and let it run for a few minutes. This allows the jumper cables to charge the dead hybrid car's battery.

6-Start the Hybrid Car: Attempt to start the hybrid car. Once it's running, you can disconnect the jumper cables in reverse order—negative cable from the donor car first, followed by the positive cable.

7-Drive to Charge the Battery: Drive the hybrid car for at least 30 minutes to allow the battery to charge fully. This will help prevent future dead battery incidents.


In some cases, even after following the above steps, the hybrid car may not start. If this happens, consider the following:

1-Battery Too Dead to Jump Start: If the hybrid car's battery is extremely depleted, it may not respond to a jump start. In this case, you will need to have the battery towed to a service station for further inspection and possible replacement.

2-Check for Other Issues: If jump-starting doesn't work, there may be underlying electrical problems or issues with the high voltage battery. Consult a professional mechanic to diagnose and resolve the issue.


Starting a hybrid car with a dead battery is a relatively simple process, but it's essential to take the necessary safety precautions to ensure a smooth and hazard-free experience. By following the steps outlined in this guide and being aware of potential issues, you can confidently start your hybrid car and get back on the road. 

Remember that regular maintenance and battery checks can help prevent dead battery situations in the first place, so be proactive in caring for your hybrid vehicle's power sources. We hope now you know “how to start a hybrid car with dead battery?”