How Many Years Does AGM Start Stop Battery Last?


All Spaceflight batteries are AGM (also known as Absorbed Glass Mat) batteries, but the question consumers often ask is “How many years can AGM Start Stop battery last?” This is a valid question, considering that AGM Start stop batteries are usually more costly than submerged battery.

Unfortunately, the answer is not easy to provide, because there are many factors that affect the sustainable life of AGM batteries, and not all AGM batteries are the same. For some people, the answer may be months, for others, the answer may be years.

How many years can AGM Start Stop battery last and why

  • Spaceflight AGM battery uses pure lead in its structure. Compared with the recycled lead used in many batteries today, whether it is submerged or AGM, it has better performance and longer life. Compared with the weaker battery-to-cell welding on many car batteries, the cast lead tape that connects Spaceflight battery cells also works better and lasts longer.
  • In addition to the quality of the materials used to construct the Spaceflight AGM battery, the climate in which any AGM battery is used will also have a significant impact on its service life. The extreme temperatures of AGM car batteries, whether hot or cold, are often more difficult than mild temperatures. This means that the battery life in Alaska or Alabama may not be as long as the battery in San Diego.
  • Applications that use AGM batteries will also affect the service life of AGM batteries. Many new cars use “start/stop” technology, which functions like a pneumatic golf cart. When you come to a complete stop, the engine shuts down. When you step on the accelerator, the engine starts again. This means that the batteries used in these start/stop vehicles can usually start the engine thousands of times over the life of the battery, rather than a vehicle that keeps the engine running for the entire time the vehicle is in use. Manufacturers know that its much more difficult for these start/stop vehicles to use batteries, so many people now choose to equip their vehicles with factory-produced AGM batteries, which can handle these better than water-filled batteries.
  • A 20-mile commute vehicle that travels at 45 mph a day during the year will not consume the battery like a vehicle that is only used occasionally for most of the year. If the battery voltage is maintained properly, the battery life tends to be longer. When the battery is in a partially discharged state for a long time, the service life of the battery is often not so long. This is true for flooded batteries and AGM batteries.

Considering these factors, we usually cannot provide a specific number of years to answer the question of how long an AGM battery can last, because each application is different. We can usually say that the service life of AGM batteries is two to three times that of flooded batteries. In the commuter car example we cited, if a battery filled with water can last three to five years, then an AGM battery can last six to ten years or more. In high-vibration commercial applications, typical flooded batteries may only last for a few weeks, while Spaceflight AGM batteries can last for several months.

The key to maximizing battery performance and service life is to use high-quality battery maintenance equipment to properly maintain the voltage in the battery. If you need help finding the right AGM battery for your vehicle.

Deep Cycle Battery Lifespan


When consumers buy batteries, in addition to the type, features and functions, they will also check the specifications, especially the battery life. Most people consider this before buying. This is one of the indicators that can judge how long the battery can be used and is useful to them. In addition, by checking this, consumers can provide maintenance (if needed) to further extend their service life.

AGM Start Stop battery Lifespan and cycles 


However, some manufacturers not only measure battery life by years, but more often by cycles. Their explanation is that you cannot guarantee that the number of years is the best indicator of longer battery life, because more important factors such as temperature, weather, and usage need to be considered. Therefore, it is more accurate to rely on the battery cycle rather than the number of years it claims. Or both. Because the two are interrelated, for example, a battery claims to be used for 25 years, but you will see in the product description that if you discharge it for about 5 years, it can only be used for the specified percentage of the year. So, if you don’t follow the recommended cycle, don’t expect the battery to last about 25 years.

A cycle is the process of fully charging and discharging the battery. When the battery has a claimed life of 1000 cycles, it only means that the battery can undergo up to 1000 discharges and recharges before reaching its useful life. This is the simplest way to explain. Note that cyle does not always reach its zero percentage with respect to a discharged battery, and its recharge percentage is again 100%.

Not all batteries have the same cycle. Cycles may vary from one type of battery to another, but generally the depth of discharge (DOD) level for all batteries can be 10%, 20%, and 50%. Therefore, the cycle of the battery plays a vital role in determining its actual life.

Please also note that it is not recommended to discharge the battery to 100%, as this will reduce the life expectancy of the deep cycle battery.

The life of a deep-cycle battery varies, depending on how it is used, maintained, and charged. Sometimes you need to consider other factors, such as depth of discharge (DOD), temperature resistance, impact resistance, frequency of cycling, etc.

However, the rich liquid lead-acid deep cycle battery and AGM deep cycle life is about 4 to 8 years, while the gel deep cycle can only last 2-5 years.

Choosing the right battery is very difficult and confusing, because everyone claims to have high-quality materials, the best performance and functions, and are very suitable as your energy storage. Since investing in deep cycle batteries is very expensive, all factors must be considered as much as possible to ensure that you get the best battery you need for your work and can last longer.

Conclusion: how to prolong AGM Start Stop battery?

Good car use habits can prolong the service life of AGM Start Stop battery to a certain extent. Of course, some bad car usage habits will also shorten the service life of the battery. For example, when the electric door of the vehicle is opened, the vehicle is powered on, but the vehicle is not started. At this time, use the electrical equipment of the vehicle, listen to music, work the dash cam, charge the mobile phone, turn on the headlights of the vehicle, and so on. This will affect the service life of the battery.

Because the vehicle does not start at this time and the generator does not work, all the electricity stored in the battery is used at this time. If the electric equipment is used for a long time, the battery stored in the battery will be used up. At this time, start the vehicle when you think about it. Nothing, because there is not enough power inside the battery to drive the starter motor to work.


Also, if all the power inside the AGM Start Stop battery is used up, the battery cannot store the power again, and the battery needs to be replaced. The generator will generate electricity after the vehicle is started, so the electricity used at this time is the electricity generated by the generator, not the electricity stored in the battery, so the battery will not be damaged. Therefore, I personally suggest not to use the electric equipment of the vehicle when the vehicle is not started.

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