The Garage Maintenance & Repair

What To Expect When You’re Expecting to Replace Your Hybrid Battery

Don't you die on me, you hear me!

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The world’s turned its back on gasoline-powered vehicles like it turned on cigarettes. They’re bad, we know they’re bad, and it’s time to start phasing them out. But like cigarettes, we can’t just go cold-turkey and go full EV, we need gum and patches. Enter the hybrid car.

Hybrids have been around so long that they’re starting to become old! With age comes parts breaking and needing replacement, just like any car part. What happens, however, when the hybrid battery itself goes out? You know, that thing that helps power your car. Should your knees tremble as they do when you open that first student loan bill?

To get into what a hybrid battery is, what types are out there, how they work, and how they die, The Drive’s sleepless editors have put together this guide to walk you through what to expect when you’re replacing a hybrid battery. Ready to get electrocuted? Just kidding!

An overlay of Acura's hybrid NSX chassis.
An overlay of Acura’s hybrid NSX chassis. , Acura

What Is a Hybrid Car?

A hybrid vehicle is one that uses two types of fuel and energy sources to achieve a singular goal of efficient propulsion. 

Types of Hybrids

Just as there are multiple types of combustion engines, there are also multiple types of hybrid powertrains. Let’s break it down into simple terms.

Mild Hybrid

On mild hybrids, the electric components are not capable of directly driving the wheels on their own. Instead, a small battery pack and electric motor act as assistants to help improve fuel economy, slightly increase performance with bursts of torque, regenerate energy, and power accessories. One of the most common jobs for an electric motor in a mild hybrid is to double as a starter and power the start-stop technology. More capable and efficient mild hybrids with 48-volt battery packs have recently proliferated throughout the industry.

Full Hybrid

A full hybrid car has electric components that can directly drive the wheels on their own, without the gas engine. Different types of full hybrids include parallel hybrids, series hybrids, and plug-in hybrids.

And if you’d like to know more about hybrid cars, how they work, and other forms of hybrids, you can check out The Drive’s guide to The Advantages and Disadvantages of a Hybrid Car.

The OG Hybrid, the Toyota Prius.
The OG Hybrid, the Toyota Prius. , Toyota

How Does a Hybrid Car’s Battery Work? 

The most common type of hybrid vehicle blends a gasoline-powered combustion engine with one or more electric motors and a battery storage pack to achieve better fuel economy than a vehicle with only a combustion engine. 

This works by the battery supplying some electrical energy to driven wheels, for example: 

  • A Prius blending electrical energy with gas
  • An Acura NSX using only electrical energy to drive the front wheels

Hybrids also use regenerative braking to return small amounts of electricity to their batteries.

Do Hybrid Batteries Die?

They do! Like all batteries, car batteries have entropy dates. The batteries are mined, refined, built, slotted into a car, used, and one day, just like Lassie, they die. This may take several years and hundreds of thousands of miles, but at some point or another, they’ll go bad and you’ll need to replace it.

The lovely P1 Hybrid.
The lovely P1 Hybrid. , McLaren

Dying Hybrid Battery Symptoms

Here are the most common symptoms you may experience when your hybrid car’s battery goes off to meet its maker. 

Bad Fuel Economy

You may experience worsening fuel economy, which tells you that the battery isn’t doing its job.

Extremely Quick Battery Depletion

If the battery’s charge depletes extremely quickly, it may be getting long in the tooth.

Odd Electrical Fluctuations

Your car may experience weird electrical fluctuations depending on what else your hybrid battery powers. 

Battery Not Kicking In

If the battery doesn’t actually kick in when it used to, the hybrid may be going out.

Clunky Driving Conditions

Since a hybrid battery drives the wheels at times, a bad or dying battery may affect your vehicle’s driving conditions. It may feel clunky or similar to a bad transmission. 

What Causes a Hybrid Battery to Die?

Life? But in all seriousness, the wear and tear of a hybrid battery will be the same as the wear and tear of any car part. You can impact your car’s hybrid battery further by not taking care of it, though. Here are a few causes that could further impact your hybrid battery’s life.

Routinely Fully Depleting the Charge

Driving the car until the battery’s fully depleted every single time, then not recharging it for a little while will reduce the overall health of the battery. Likewise, constantly filling the battery up to 100-percent charge will decrease its longevity too due to thermal load. 

Infrequent Maintenance

You’re the biggest variable in your car’s reliability by a long shot. Take care of your car, follow its maintenance schedule, and it’ll take care of you.


As with anything, if you’re involved in an accident or damage the battery in some way, that can reduce the health and longevity of the hybrid battery considerably.

A very good Accord Hybrid.
A very good Accord Hybrid. , Honda

Find Your Next Car With Carvana

You know how satisfying it is to drop a coin into a vending machine, type in the respective alphanumeric code for a Reese’s, hear the whirring of the motor twisting the delicious chocolate-covered peanut butter cup out toward you, and finally falling into the bin for your to enjoy? Yeah, that’s how easy it is to now buy your next car thanks to Carvana.

Carvana has taken the vending machine process and applied it to car purchases, coin and vending machine included. They can also be delivered to your home, just like that Knives Out-like knit-sweater you won’t ever wear. With thousands of cars to choose from across all makes and models, Carvana’s selection is extensive and the company’s confident, even offering a 7-Day Risk-Free Return policy, it has your next car. 

That’s why The Drive’s partnered with Carvana to help you find your next ride! Are you ready to get your next car out of a vending machine?

The hybrid McLaren Speedtail being assembled.
The hybrid McLaren Speedtail being assembled., McLaren

FAQs About Hybrid Battery

You’ve got questions, The Drive has answers!

Q. What Happens When You Run Out of Electricity in a Hybrid?

A.  You keep driving! That’s the beauty of a hybrid: When your EV juice runs out, you’ve still got a tank of gas as a back up!

Q. So Can You Recharge a Hybrid Battery?

A. If you’re talking about recharging your car every night, sure! If you’re talking about after it dies, nope!

Q. But Can You Still Drive a Hybrid Without the Battery?

A. Short answer? Maybe. If the hybrid battery fails, you may be able to drive it, but the experience won’t be similar to that of a straight gasoline-powered car. It’ll likely be jerky and could damage the other drivetrain components. And if it’s a system in which it acts as an alternator and starter as well, you may be calling a tow truck.

Q. Ok, Then How Often Does a Hybrid Battery Need to be Replaced?

A. Here’s where there’s some disagreement. Though hybrids have been around for almost 20 years, there’s still not enough data to figure out when things will fail. Most manufacturers say between 100,000-150,000 miles, but depending on your level of care and how you drive, it could be more or less. 

Q. Then Do Hybrid Cars Cost More to Maintain?

A. Not really. The only real extra cost in maintaining a hybrid is if the battery pack fails, and that’s pretty rare. 

Q. How Much Does it Cost to Replace a Hybrid Car Battery?

A. Cost will depend on the car, but the average cost is between $1,000-$8,000.

Let’s Talk, Comment Below To Talk With The Drive’s Editors!

We’re here to be expert guides in everything How-To related. Use us, compliment us, yell at us. Comment below and let’s talk! You can also shout at us on Twitter or Instagram, here are our profiles.

Jonathon Klein: Twitter (@jonathon.klein), Instagram (@jonathon_klein)

Tony Markovich: Twitter (@T_Marko), Instagram (@t_marko)

Chris Teague: Twitter (@TeagueDrives), Instagram (@TeagueDrives)


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Jonathon Klein Avatar

Jonathon Klein

Managing Editor, Commerce

Jonathon is the Managing Editor for Commerce at The Drive and has been writing about cars and motorcycles for over a decade, but he's been known to scribble pretty things about the foster care system, adoption, tattoos, sex and life, gear, adventures, food, autonomy, technology, and numerous other topics. He’s been working for The Drive since 2019 when he started as its Senior Editor.