Top Signs Your Mustang Needs a New Battery

Is your Mustang’s electrical system all out of whack? Or is your vehicle failing to start without a jump? Unfortunately, these are signs that you need to replace your Mustang’s battery, and the good news is that you've come to the right place. In this comprehensive guide, we take you through the top signs that your Mustang needs a new battery. Whether you’re on the fence about the battery or Mustang alternator or you just want to be sure, we have your back.

How Long Does Your Mustang Battery Last?

First things first, it's important to understand how long your Mustang’s battery lasts. We know that you’re probably more focused on the engine, making gains, and improving your power plant, but without a battery, you have no power to start with. Ultimately, you can expect your Mustang’s battery to last for around three to five years. Typically, you'll find that climates with extreme heat and cold temperatures will wear out your battery faster, so keep this in mind. Thankfully, you don't have to settle for a few years of service, especially if you're adding power to your Mustang. In fact, premium options like the Antigravity Battery H5/Group-47 Lithium Car Battery feature an impressive 40 Ah capacity with 1500 cold crank amperage (CCA). What's more, batteries like these come with five-year warranties, so even if they fail early, you don't have to worry about being on the hook.

5 Signs Your Mustang Needs a Battery

While it can be tricky to know if it's a battery, alternator, or another electrical issue, there are a handful of signs that your Mustang’s battery is failing. We take you through a handful of the most common signs.

1. Your Mustang Has Problems Starting

Is your Mustang having trouble starting? If you turn the key and your engine won't start without a jump, it's a warning sign that you need a new battery. What's more, if the engine runs fine once it's started, it's likely your battery and not the alternator. If you're lucky, you may be able to catch this issue before you end up stranded. Some early signs include your engine taking longer to start during the winter and longer crank times.

2. Corroded Battery Terminals

One of the best ways to determine if your ride needs a new battery is to simply pop the hood and take a look at the battery terminals. Aside from the terminals, it's also a good idea to check other areas of the battery and its surrounding components. Do you see a white and powdery buildup around the terminals? Or do you notice that the battery’s casing is bloated or cracked? These are some physical signs that show you it's time to swap out that old battery. In fact, you should act fast because corrosion can spread to additional components and cause damage.

3. Illuminated Battery Light on Your Dashboard

Is your battery light active on your dashboard? In your Mustang, this is a small red light that outlines a car battery. While this doesn't always indicate a battery problem, as the image would suggest, it's never a bad place to start. This is due to the fact that this light appears on your dashboard when you’re facing electrical problems. Now, if you notice this problem alongside dim lights inside and outside of your Stang when the engine isn't running, it's time to check on your battery.

4. Rank Odors

This one usually flies under the radar, but do you notice a strange smell in your cabin? If so, you may be smelling battery acid. Typically, when your battery starts to leak, it's time to replace it, and when it leaks, you'll notice a rotten egg smell from within the cabin. While you won't always smell it in the cabin, you may notice it when you pop the hood.

5. Your Mustang’s Battery Is Old

As we mentioned earlier, your Mustang’s battery won't last forever. If your Mustang’s battery is more than three to five years old, it's time to keep an eye on it. In fact, if you don't have an upgraded battery, you may want to replace it sooner rather than later for the best results. Failing to do so can result in you ending up stranded, so it's usually better to be safe than sorry, especially if you don't start your engine often and live in a climate with cold winters.

Get the Mustang Battery You Need Today

While we wish that your battery would last forever, the good news is that they're fairly easy and affordable to replace. In fact, you'll find that we carry a wide variety of Mustang batteries from the best brands in the industry. Whether you want to upgrade to a racing battery that will supply enough power for your drag build or you just want to replace your stock battery, you've come to the right place. Connect with our sales techs to find the best battery for your Mustang when you shop online.