Why Car Batteries Die in the Summer: Mechanic Insight

August 24, 2023
Why Car Batteries Die in the Summer: Mechanic Insight

The summer heat can be brutal on the components inside your car battery. The heat under the hood (or trunk, for some) significantly rises in temperature, which increases the risk of battery failure. Unfortunately, this is a common occurrence during the hotter months, and over the summer, many North Carolina drivers find themselves stuck on the side of the road due to battery failure from the heat.

As you prepare for your road trips this summer, here are a few things to keep in mind so you get the most use out of your car battery


How Does Extreme Heat Affect a Car Battery?


When summer comes around, we tend to move at a slower pace because the heat makes us sluggish, and we’re looking to conserve energy. The sun makes us sweat, leaving us thirsty and searching for water to replace what we’ve lost. Your car battery has a similar experience, with the heat impacting it in several ways that harm its performance. Some of the main effects heat has on car batteries include: 

  • Heat evaporates the battery’s vital fluids: As your hood or trunk gets warmer, the heat will evaporate the battery’s fluids. Without these fluids, your battery will send a weaker charge to other parts of the car. Eventually, the charge will grow so weak that your battery won’t be able to hold it.
  • Heat speeds up the corrosion process: Besides impacting your battery’s charge, heat can increase the speed of corrosion on your battery. Once the internal components become corroded, the damage is irreversible. It’s even worse when the vital fluids have been drained from the battery, as evaporated battery fluid can corrode battery terminals and cause structural damage.
  • Heat weakens the battery’s overall function: Heat damage will leave the battery weakened, which may cause your battery to fail in the summer. However, it can also make it so your battery can’t perform well once the seasons change and your battery starts to experience freezing temperatures. If your battery’s overall function is impacted during the summer, cold weather will likely kill the car battery and cause it to die much faster in the winter.


How Does Extreme Heat Affect Electric Vehicle Batteries?


Electric car owners aren’t free from the problems caused by high temperatures. Although electric vehicle (EV) batteries can keep running strong for up to 20 years, extreme heat can reduce their lifespan. Some of the primary effects heat has on EV batteries include: 

  • An electric car battery may lose up to 20% of its range: When the temperature is above 95 degrees, EVs that normally make it 100 miles will only go 80 miles under these weather conditions.
  • The battery needs to be charged more often: Since distances in hot weather are reduced, EVs can’t make as many trips on one charge. As a result, you’ll find yourself charging your EV’s battery more often in the summer.


How to Protect Your Car Battery In Hot Temperatures


Though heat can be brutal to your car’s battery, there’s plenty you can do to protect your battery and avoid an early car battery replacement. If you want to keep your battery running well all summer long, follow the below tips for how to protect your car battery from heat:

  • Clean the battery: If you notice dirt, debris, or greasy buildup on the battery, remove it right away. Examine the battery regularly for these issues to ensure it remains in peak condition.
  • Watch for corrosion: Hotter temperatures outside mean even hotter temperatures inside the vehicle’s engine. This can cause corrosion that will restrict the electrical current flow. If you notice any corrosion, a mechanic can use a copper brush or scouring pad to remove it from the battery.
  • Drive the car regularly: Since heat drains the battery, it’s important to take a trip of 20 minutes or longer each day to ensure the battery replenishes and doesn’t discharge. If the car will be parked for an extended period, look into using a battery minder or smart charger.
  • Park in a shaded area: Just sitting in the hot sun can cause problems for your car’s battery. Whenever possible, park in a shaded area, under a car park, or in a garage to shield it from heat.
  • Check the water level: Lead-acid batteries must maintain a certain water level. If it’s low, use distilled water to replenish what was lost.
  • Take your vehicle in for an inspection: One of the best ways to protect your car’s battery from heat is to bring it in for an inspection at the start of summer. If the inspection reveals your battery has corroded or is close to running out of power, the mechanic can clean your battery, fix any issues, and potentially provide a car battery replacement service if the battery is past the point of repair. 


How Can EV Owners Protect Their Vehicle’s Battery?


Alongside following the tips above, EV owners can protect their battery by charging it to the midpoint, or 50% to 60% of its total capacity. Since fully charging an EV battery can cause it to degrade faster, not charging it to its full capacity will ensure the combination of heat and a full charge won’t cause your battery to degrade even faster. You’ll also want to avoid using fast-charging stations over the summer, as fast charging can cause a battery to degrade faster.


Choose Chapel Hill Tire for Car Battery Service In the Triangle


If you need car battery services near you in Raleigh, Durham, Chapel Hill, or the surrounding areas, Chapel Hill Tire can help. Whether you need a new car battery or an inspection, our team will ensure your vehicle’s battery works at its best before you hit the road again. You can also review our coupons to ensure you get a great deal on our services.


Learn more about our car battery services today. If you’re ready to bring your car in for an inspection or car battery replacement service, please find a location close to you and make an appointment.

We’ve got all your automotive repair needs covered.

A row of black tires are stacked on top of each other.
By Erin Vernon May 14, 2025
Brakes stop your wheels, but tires are what really stops your car.
A bottle of green liquid is being poured into a car radiator.
By Marc Pons May 8, 2025
It can be hard to keep up with all of the care that your vehicle needs. When a light comes on in your dashboard or a mechanic lets you know you are due for a new service, this can surface lots of questions. One common source of service confusion is the coolant flush. Thankfully, Chapel Hill Tire has you covered. Here is a look at the answers to all of your common coolant flush questions. Is it Really Necessary to Flush Coolant? Perhaps the most common question surrounding this service is, “Are coolant flushes really necessary?” The short answer is YES.  Your engine creates friction and heat in order to run properly. However, your engine is also made of metal pieces, which are malleable and vulnerable when heated. Extensive heat can cause a blown radiator, cracked gasket head, warped cylinder, and melted seals, among numerous other serious, dangerous, and expensive issues. To protect your engine from this heat, your radiator contains coolant that absorbs excess heat. Over time, your coolant will become worn out, burnt, and contaminated, causing it to lose its cooling properties. While you might not like hearing that you are due for an extra service, coolant flushes are necessary for a safe and healthy vehicle. Does Coolant Matter During Cold Weather? As we approach the fall and winter temperatures, you may become increasingly tempted to ignore coolant services. Does coolant matter in the cold weather? Yes—the friction and power of your engine generate heat year-round. While the summer temperatures certainly do intensify engine heating, coolant is still incredibly important in the winter. Additionally, coolant contains antifreeze, which will protect your engine from the dangers of cold temperatures. What is the Difference Between Coolant and Radiator Fluid? When reading your owner’s manual or various resources online, you might find “coolant” and “radiator fluid” terms used interchangeably. So are they the same thing? Yes! Radiator fluid and coolant are different names for the same material. You might also find it referenced as “radiator coolant,” which offers the best of both worlds. Is Coolant the Same as Antifreeze? Another common question that drivers ask—“Is antifreeze the same thing as coolant?” No, these two are not quite the same. Rather, coolant is the substance used to regulate the temperature of your engine. Antifreeze is the substance within your coolant that prevents freezing in the winter. You might find some sources that refer to coolant as providing cooling properties only; however, since the coolant often contains antifreeze, it has widely become a general term that encompasses both. How Frequently Are Coolant Flushes Needed? Generally speaking, a coolant flush is often needed every five years or 30,000-40,000 miles. However, coolant flush cadence can be impacted by your driving patterns, local climate, vehicle age, make, and model, as well as other factors. Consult your owner’s manual or a local professional for insight on whether or not you are due for a coolant flush. Additionally, you can look for signs of a needed coolant flush. These include a sweet maple syrup car smell and vehicle engine overheating. Take a closer look at these and other signs of a needed coolant flush here . How Much Does a Coolant Flush Cost? Many mechanics try to hide their prices from customers, which can create questions, confusion, and unpleasant surprises. While we cannot speak for the costs you will face at other mechanic shops, Chapel Hill Tire offers transparent pricing for every coolant flush and other services . Our coolant flushes cost $161.80, which includes the safe disposal of your contaminated fluid, professional-grade cleaning of your cooling system to remove rust and sludge, high-quality new coolant, coolant conditioner to keep it preserved, and a visual inspection of your entire cooling system. Chapel Hill Tire: Local Coolant Flush When you are due for your next coolant flush, visit one of Chapel Hill Tire’s eight Triangle-area locations, including our mechanics in Raleigh, Durham, Carrboro, and Chapel Hill. Our professionals will help you drive happy by getting you in, out, and on your way with fresh coolant. Make your coolant flush appointment today to get started!
A close up of a car engine with oil being poured into a bucket.
By Marc Pons May 5, 2025
Oil Change Prices Why do most mechanics and dealerships hide the costs of their services? You might be wondering if they will try to take advantage of your visit and overprice their services. Or perhaps they think that their oil changes are so expensive that displaying their service costs would deter customers from visiting the shop. At Chapel Hill Tire, we value our customers, which is why we display transparent pricing for all of our services. Here is everything you need to know about the actual price of oil changes. What Does an Oil Change Involve? One of the most common vehicle services—and arguably the most important for keeping your engine protected—is the oil change . This product keeps your engine lubricated so that it can function without harmful friction. Over time, your oil becomes filled with debris, making it less effective in providing proper protection for your engine. Your oil levels also become depleted as your engine burns through your oil supply. This is where an oil change comes in. Not only do you need to supply your vehicle with oil, but you also need to remove the old oil and replace the filter that prevents the harmful debris from entering your engine. If you partner with an outstanding oil change expert, you will also receive routine vehicle checks included in the price of your oil change. On average, you need an oil change every 3,000 miles or every six months , whichever comes sooner. Maintaining regular oil change services will keep your vehicle protected and prevent costly engine damage from occurring. How Much Does an Oil Change Actually Cost? Every mechanic has to price their oil changes in a way that helps keep business open. However, you want to ensure that this number does not take advantage of your visit. Here is how much an oil change actually costs your mechanic: Oil Costs : Perhaps the most obvious expense, the mechanic will pay for several quarts of oil to fill your reserve. There are multiple different types of oil that vary in thickness, which can affect your oil change costs. If you take a look at your oil cap, it will tell you which type of oil your engine requires. Labor Cost : Here, you pay for the years of experience and the professional care provided by your oil change technician. You also reap the convenience of having an expert take care of your vehicle. Filter Cost : Your oil filter keeps contaminants out of your engine. These contaminants can wear away at your filter over time, which is why you require regular filter replacements. The cost of your filter may vary slightly depending on your vehicle make, model, trim, and year. Disposing of Used Oil Cost : Part of the hassle of an at-home oil change is navigating the disposal of the old, messy, and contaminated oil. An expert mechanic has the resources and an established process to ethically dispose of old oil. Collectively, what you pay will reflect the cost of the oil change for your mechanic. Even with all of these offerings, oil changes are often reasonably priced—usually running between $40-$70. You can also find oil change coupons to help offset the cost of this service. Transparent Oil Change Prices You won’t find hidden costs here at Chapel Hill Tire. Instead, we keep all of our prices clear and transparent on our services page . The only variance possible in this price is if your vehicle requires a filter or oil that is non-standard or higher in cost. This price includes five quarts of oil, an oil filter change, an air filter check, a fluid levels check, an inspection of your belts and hoses, and a tire air pressure check. Visit Chapel Hill Tire | Oil Changes with Transparent Prices If you are ready to ditch the traditional hidden oil change costs, visit your local Chapel Hill Tire location. With 8 Triangle-area shops—including mechanics in Raleigh , Chapel Hill , Durham , and Carrboro —you can get a quick and affordable expert oil change no matter where your day takes you. Schedule your Chapel Hill Tire oil change today to get started!
A man is changing a tire on a machine.
March 25, 2025
Buying new tires can feel overwhelming—there’s plenty to consider, from price and brand to performance and safety. To simplify this essential purchase, this guide walks you step-by-step through choosing the right tires for your vehicle, ensuring you get the best value and performance for your investment.
A person is fixing a tire with a screwdriver
March 24, 2025
Fix-a-Flat is a popular liquid tire sealant meant to seal small punctures in a tire and is regularly used by drivers looking for a quick solution to a flat tire. While many people use Fix-a-Flat, it can cause more problems than it solves, and most mechanics won’t recommend you use it. As you decide whether you should keep a spare can of Fix-a-Flat in your car or garage, take a moment to learn why Fix-a-Flat and other similar products can be bad for tires and what to use instead when you get a flat.
A car with a chapel hill sticker on it
By Jess Cervantes March 10, 2025
Wondering how to properly clean pollen off your car? Chapel Hill Tire can help. Review our guide to protecting your car from pollen damage today!
A car is driving down a road with a circle around it
By Mike Storey March 10, 2025
Want to learn more about modern safety features in cars? Chapel Hill Tire can help. Review our guide to the 5 main types of vehicle safety features.
An electric car is being charged at a charging station
By Emma Baker March 10, 2025
Wondering how many EV charging stations there are in Chapel Hill, North Carolina? Review our guide to Chapel Hill EV chargers and a directory of them!
A stack of tires sitting on top of each other on a shelf.
By Marc Pons February 18, 2025
Wondering when you need to buy new tires for your vehicle? Chapel Hill Tire can help. Review our guide about when to replace your vehicle's tires today!
A woman is adjusting the air conditioning in her car
By Marc Pons February 14, 2025
If you need to get your car's AC system working before the warm weather sets in, Chapel Hill Tire has the insight you need to get & keep your AC working.
Show More