10 Warning Signs Your Car Battery is Dying

10 Warning Signs Your Car Battery is Dying

Car batteries are notoriously fickle and some of the most volatile parts living beneath the hood. It doesn’t take much for them to go bad, and they usually only live for a few years before needing to be replaced. But when they die, they do so in glorious fashion: Like when you’re already running 20 minutes late to work, for instance. (What a terrible way to begin your day!)

Fortunately, there are numerous, unmistakable signs that your car battery is on the verge of failing. Here are the 10 most common symptoms of a dying vehicle battery:

10. “Check Engine” Dashboard Light On

The “Check Engine” light is a catch-all warning telling you something is wrong – not necessarily something related to your battery. However, it’s not uncommon for the issue to stem from a bad car battery. For instance, when you bring your vehicle into a service center to investigate your mysterious warning light, they’ll test the battery first.

9. Engine Turns Over… Slowly

Your car engine should kick into action virtually instantly. If it’s slow to start – meaning it stutters before turning over – the issue could be related to your battery, alternator or starter.

8. Ignition Clicks

A car engine that doesn’t turn over at all is a larger issue than a slow-to-start engine. Sometimes the engine will click repeatedly while it cranks to life, which signals that there is no or a limited amount of power being supplied by the battery.

7. Dim Headlights

Your car’s headlights will appear duller and dimmer than normal if there’s not enough power available to keep them on. You’ll sometimes notice your headlamps adjust brightness randomly or simply not work at all.

6. General Electrical Problems

Radios, dashboard lights, windshield wipers, and power window controls will go to Wonkytown when the battery is dying. Essentially, any electrical component, feature or function that isn’t working properly could be failing because the car battery is on its last legs.

In rare instances, your electrical problems may stem from something worse than a dead battery. If this is the case, you may want to buy or lease a new car instead of messing with repairs. Try a hybrid model like the 2021 Honda Insight, which comes with an 8-year High-Voltage Battery Limited Warranty*. If your Honda Insight battery dies during that 8-year span (or within 100,000 miles), Honda will replace it.

10 Warning Signs Your Car Battery is Dying

5. Corroded Battery Terminals

One of the main reasons why car batteries die is because of corrosion. Battery acid will leak out at the connectors, then harden and reduce the amount of contact between terminals and connecting points. This reduces the battery’s ability to recharge via your vehicle’s alternator.

Battery corrosion will be quite visible to the naked eye; the terminals will have blue-green powder caked on them. In some instances, cleaning your car battery terminals with a dry rag of toothbrush can extend the life of the battery. However, it’s usually best to consider buying a new battery, just to be safe.

4. Cold Weather

Exposed to cold temperatures for an extended period, car batteries are more likely to fail prematurely. At 32 degrees Fahrenheit, car batteries will be up to 35% weaker than normal, but they’ll also try to act like they’re functioning at 100% efficiency. This will cause the batteries to permanently weaken over time, until it fails completely.

If your battery freezes entirely, it could be “electrically dead.” This is almost certainly a problem that can’t be repaired or recharged, so you’ll likely need to buy a new one.

3. Smells Bad

If you attempt to start your car and then open the hood, you may smell something similar to rotten eggs or sulfur. This is a typical sign of a leaking battery, which can be caused by old age, external damage to the battery terminals or case, or an internal short-circuit. A visit to your repair shop or auto parts store is the next step.

2. Bulging Battery Case

Extreme heat or cold will force your battery case to take on unfamiliar shapes. They may bulge and swell – this can be dangerous! – or crack, leaking battery acid out. Any battery that’s not rectangularly shaped should be properly discarded (i.e. recycled – ask your auto repair center to help you recycle your old car battery).

1. Old Age

Most car batteries, with the exception of electric vehicle batteries, will only live for three to five years, depending on driving conditions and weather. Do you remember the last time you replaced yours? Check the battery’s manufactured date on the case; If it’s been at least four years since the battery was built, have it tested.

Diagnosing a dead or dying battery can be difficult, leaving you flustered, frustrated, and unsure of what to do next. Is the battery in need of a jump-start because you left the lights on or door ajar overnight? Or is there a more sinister reason why your battery’s as lifeless as a doornail? In some cases, you may need to speak to an expert for assistance.

If your battery’s seemingly gone kaput, and you happen to live in the Phoenix area, our Arizona Honda service centers are here to help with your dead battery, alternator, spark plugs, and solenoids. Call the closest Valley Honda Dealers location to schedule an appointment or tow straight to one of our repair shops. We serve all of Phoenix, AZ, including Tempe, Scottsdale, Mesa and beyond.


*8-year/100,000-mile warranty covers abnormal loss of capacity in the hybrid’s high-voltage battery. Other warranties may provide additional coverage for the high-voltage battery. See dealer for details.