Why Is AGM Battery Not Holding a Charge?

When you receive your new AGM battery, there is usually excitement that comes with it. You can’t wait to get it installed in your car and start enjoying the benefits of a longer-lasting battery. However, sometimes that initial excitement fades when you find out that your AGM battery is not holding a charge as it should. So what do you do? Don’t worry, we’re here to help. In this blog post, we will discuss some of the reasons why is AGM battery not holding a charge and how to fix them. Stay tuned.

Why is the AGM battery not holding a charge?

AGM (Absorbed Glass Matt) batteries are designed for high performance and can keep a charge for a long time. However, there are several reasons why an AGM battery won’t charge.

    • The most common reason is that the battery has been overcharged. When this happens, the sulfuric acid in the battery can become depleted, and the plates inside the battery will corrode. This will reduce the overall capacity of the battery and eventually cause it to fail.
    • Another common reason why an AGM battery is not holding a charge is because of a bad connection. This can be caused by corrosion on the terminals or loose wires. If you think this might be the problem, take a look at the terminals on your battery and make sure they are clean and free of corrosion. If there is any corrosion present, use a wire brush to remove it. You should also check the wiring system in your car for any loose wires. If you find any, tighten them up with a screwdriver.
    • One other reason why AGM batteries are not holding a charge is that they are being drained by something. It is possible that there is a short in your electrical system causing the battery to discharge even when the car is turned off. It is also possible that you have a parasitic drain on your battery, which means that some device or component is drawing power from the battery even when it’s not supposed to.
    • A faulty alternator can also be the cause of a discharged battery. When the alternator fails, it will not produce enough power to keep the battery charged. If you think this might be your problem, have your car’s electrical system checked by a mechanic.

If one of these AGM battery failure symptoms is causing your battery to not hold a charge, it is best to take it to a mechanic for repair. Trying to fix the problem yourself could damage the battery or create a dangerous situation, especially if you are not familiar with the troubleshooting procedure. Let a professional take a look at it and get it fixed right away.

How do I know if my AGM battery is bad?

AGM batteries are not supposed to die very quickly, and they are known to last long. If you’re experiencing battery failures with your AGM battery, it’s likely something else is going on, such as a bad alternator or corroded cables.

AGM batteries are a bit more expensive than regular lead-acid batteries, but they offer many advantages. For one, they’re completely sealed and can be mounted in any position. They’re also much lighter than lead-acid batteries and can last up to 10 years if properly maintained.

With these great features, we all know that batteries will degrade and decrease their performance over time. AGM batteries are not exempted from this rule.

There are a few things you can look for to determine if your AGM battery is bad. One of the easiest ways to tell is if the battery is swelling. AGM batteries are not supposed to swell, so if you notice that your battery is starting to swell, that’s a clear sign that there’s something wrong with it and it needs to be replaced.

Another way to tell is by checking the voltage level. AGM batteries should read at 12.6 volts or higher when fully charged. If the voltage level falls below 12.6 volts, that’s another sign that the battery might be bad.

Finally, you can also test the battery’s cranking amps (CA). This will give you an idea of how much power the battery can provide when starting your car. A good AGM battery should have a cranking amps rating of at least 500 CA. If your battery falls below this number, it’s time to replace it.

There are many symptoms of a bad AGM battery, but these are some of the most common indicators that there might be a problem. If you’re experiencing any of these issues, it’s best to have your battery checked by a professional to determine if it needs to be replaced.

How do you rejuvenate an AGM battery?

AGM batteries are used in a wide variety of applications, from boats to RVs to cars. They are popular because they offer a number of advantages over other types of batteries, such as greater resistance to vibrations and shocks, longer life, and faster charging.

However, over time even AGM batteries will eventually lose their charge capacity and need to be rejuvenated. One way to rejuvenate the AGM battery is by completely discharging the battery and then recharging it. It’s important not to try to partially recharge an AGM battery this will not work and may actually damage the battery.

If this does not work, bring the battery to a professional who can test it and determine if it needs to be replaced.

What kills an AGM battery?

There are a few things that can kill an AGM battery. Overcharging, undercharging, excessive heat, and incorrect charging are the main culprits.

  • If an AGM battery is overcharged, the excess voltage will cause the electrolyte to gas out of the battery. This gas can build up and eventually spark a fire.
  • If an AGM battery is undercharged, it won’t get enough of a charge to work properly and will eventually die.
  • Excessive heat can also be harmful to AGM batteries. When subjected to high temperatures, the plates inside the battery can warp and lose their ability to store energy.
  • Finally, incorrect charging can also damage or kill an AGM battery. So it’s important to only use a charger that’s specifically designed for AGM batteries.

In conclusion, it is important to be aware of how your AGM works and behaves to keep it healthy and lasting as long as possible. By following the proper care instructions, you can ensure that your AGM battery will provide years of dependable service.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.