Batteries for diesel trucks and other commercial semi-trucks are the heart of your vehicle’s electrical system. These durable components are made for long hauls, extreme weather, and running all your in-cabin electronics.
You rely on your truck’s battery to provide the energy required to do your job. So, when this power source shows signs of trouble, you’ve got to take action promptly.
Let’s explore some common signs you need a new battery for your semi or diesel truck.
Common Signs of Battery Failure
A semi typically has two long-lasting truck batteries that are connected in parallel to provide enough power to start diesel engines, power onboard accessories, and sustain your vehicle for those long hauls. Some heavy-duty Kenworth models even have three or four batteries working together to handle the increased power demands.
Even if one of your batteries is failing, it’s wise to replace them all, as battery failure can impact the performance and reliability of the others. So, how do you know when it’s time to replace those batteries? If your truck experiences any of the following signs, it’s worth having your power source tested by a professional.
Battery Age
How long do semi batteries last? Depending on how they’re used and maintained, you can get about three to five years out of your heavy-duty truck batteries. If you’re reaching the end of its life span and the battery is showing other signs of failure, it may be time for a replacement.
Slow Engine Crank
When you turn the key, does the engine turn over very slowly? Is it making a grinding or sluggish sound rather than its usual quick rotation? If the engine is struggling to start or cranking more slowly than normal, this is an early warning sign that the battery isn’t providing enough power to engage the engine. Powerful diesel engines require a lot of power, so your battery needs to be in good condition.
Dim Headlights or Electrical issues
Your semi’s electrical system draws power from the battery. That means a failing battery can cause various electrical problems, especially when idling or at low speeds. You may notice these issues:
- Dimming headlights
- Sluggish power windows
- Radio cutting out unexpectedly
- Climate control issues
- Other strange electrical concerns
These are all signs that your battery doesn’t have enough juice to meet the demand.
Frequent Jump-Starts
When your battery is not holding a charge, you will often hear a clicking sound when you turn the key instead of the usual engine roar. A jump-start is a short-term fix to start your truck, but it isn’t a safe or sustainable solution. If you’re jump-starting your truck frequently, it’s time to buy a new battery.
Corrosion or Leaks on the Battery Terminals
When you check your battery, it should be clean. While light buildup is normal, you shouldn’t see excessive corrosion or leaking battery fluid on the terminals, which can interfere with the battery’s ability to charge and discharge properly. This buildup is often a sign that the battery needs replacing, especially if it’s reached that five-year mark.
Semi-Truck Battery Maintenance Tips
While reliable truck batteries are built to meet the high demands of your industry, proper care and maintenance ensure that these power sources enjoy a long life span. Regular battery care can reduce downtime, help you avoid costly repairs, and keep your operations running smoothly so you can get the job done.
Here are some tips to make sure your truck batteries remain in good working order:
- Regularly inspect your battery.
- Clean the batteries and battery terminals on a regular basis.
- Ensure all electric systems and accessories are switched off before leaving your truck.
- Check the voltage levels with a voltmeter once a month to monitor battery health.
- Consult with an experienced semi-truck technician like the pros at Inland to ensure optimal battery performance.
Why Choose Inland for Your Semi-Truck Battery Replacement
When it’s time for new batteries, you need a trusted provider to connect you with the right replacement parts to keep your semi running strong. Inland is one of the largest and most experienced Kenworth dealers in the U.S. and Canada with over 40 convenient locations.
We offer a wide selection and competitive pricing on leading semi-truck battery brands, like Interstate and Odyssey, known for their high performance in the most demanding applications.
When you choose Inland, you can count on:
- Expertise: We’ve been serving truckers with outstanding parts and service for over 70 years.
- Convenience: Come by one of our dealerships or dedicated parts-only stores, or shop online for easy access to the batteries you need.
- Reliability: We only sell batteries from the most reputable truck battery manufacturers.
- Customer support: Every location offers comprehensive customer service with industry guidance to ensure you find the right battery solutions.
Power Your Journey With Inland
Don’t let a failing battery slow you down. Turn to the expert team at Inland. We can help you find a high-performance battery to keep your semi-truck powered up. Every one of our U.S. locations and many of our Canadian dealerships has a wide inventory of replacement parts, including batteries from top brands you know and trust.
Visit our parts page to order your replacement battery online, or find a dealer near you to discuss your truck battery needs.
