Knowledge

AGM batteries: Powerful & durable

Everyone is talking about AGM batteries, but what is really behind this technology? Are they just hype or do they actually offer tangible benefits? In this detailed blog post, we take a closer look at AGM batteries and explain everything you need to know. From the technical basics to the specific advantages and the ideal areas of application - you'll find all the answers here!

You can also watch the corresponding video here:

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What are AGM batteries and how do they work?

AGM stands for "Absorbent Glass Mat" and describes a special design of lead-acid batteries. In contrast to conventional wet batteries, in which the electrolyte (the acid) is liquid, in AGM batteries it is completely absorbed in a glass fiber fleece. This fleece acts like a sponge and holds the acid securely in place. As a result, there is no more free electrolyte space and the battery is completely sealed and maintenance-free.
Das Bild zeigt die Grafik des Aufbaus vom inneren einer AGM-Batterie.

AGM batteries belong to the category of VRLA batteries (Valve-Regulated Lead-Acid), which means that they are valve-regulated. This means that they only release gases in the event of overpressure, for example during the charging process. During normal operation, the resulting gas is recombined, i.e. converted back into acid and bound in the glass fiber fleece. This closed circuit makes AGM batteries absolutely maintenance-free and leak-proof - a major advantage over conventional wet batteries.
Das Bild zeigt eine Grafik, die den Vorgang der Gasrekombination im Inneren einer Batterie darstellen soll.

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The power advantages of AGM batteries

The special construction with glass fiber mats has some decisive advantages that make AGM batteries an attractive choice:

Higher performance

The full contact surface between plates and electrolyte enables faster electron exchange. This means that the battery can deliver more power in less time compared to conventional batteries - ideal for powerful starts or demanding applications.
Das Bild zeigt eine Grafik, die abstrahiert den starken Elektronenfluss innerhalb einer Batterie darstellt, der dazu führt, dass sie Strom liefert.

Longer service life

AGM batteries are known for their high cycle stability, which means that they can be discharged and recharged more frequently before they lose their capacity. This results in a significantly longer service life compared to conventional batteries.
Das Bild zeigt ein Schaubild mit zwei Batterien. Es symbolisiert mittels eines Balkendiagramms, dass die AGM-Batterie doppelt so zyklenfest ist.

Better behavior at low currents

AGM batteries also cope well with low currents and can still reliably supply power even when partially discharged. This makes them ideal for vehicles with start-stop systems or for applications where the battery is often only used for short periods.

Vibration resistance and robustness

The compressed plate packs and close-fitting separators make AGM batteries particularly resistant to vibrations and shocks. This makes them the ideal choice for off-road vehicles, motorcycles or boats, where they function reliably even under demanding conditions.
The picture shows a graphic of a battery that is under vibration. The term "AGM" is written on the battery. The motif is described with the word "shake-proof".

Fast recharging

Thanks to the efficient exchange of electrons, AGM batteries can be recharged more quickly than conventional batteries. This is particularly important for vehicles with start-stop systems or applications with short charging cycles.
Das Bild zeigt eine Grafik einer Batterie, die mithilfe eines Ladegeräts geladen wird

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Areas of application for AGM batteries: Where do they make sense?

AGM batteries are versatile and are particularly suitable for the following applications:

Vehicles with start-stop system

The high performance and cycle stability make AGM batteries the ideal choice for modern vehicles with automatic start-stop systems that place high demands on the battery.
Das Bild zeigt zwei schwarze Batteriekästen mit der Aufschrift intAct Start-Stop-Power AGM

Vehicles in short-haul traffic

Even if your vehicle is mainly used for short distances and the battery is not always fully charged, AGM batteries are a good choice as they work reliably even at low currents.

Motorcycles

The vibration resistance and robustness make AGM batteries the perfect choice for motorcycles that are frequently exposed to vibrations and shocks.
sla agm test 1060 6:2

Boats and motorhomes

As supply batteries in boats and motorhomes, AGM batteries provide a reliable power supply for lighting, electronics and other consumers.
Das Bild zeigt zwei schwarze Batteriekästen mit der Aufschrift intAct Active-Power AGM

Solar systems and UPS systems

Fast recharging and the ability to provide power even when partially discharged make AGM batteries a good choice for solar systems and uninterruptible power supplies (UPS).
Das Bild zeigt einen hellgrauen Batteriekasten mit der Aufschrift intAct Solar-Power AGM

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Where are AGM batteries less suitable?

Although AGM batteries offer many advantages, there are also some applications for which they are less suitable:

Vehicles with high currents and loads

For applications with extremely high currents and loads, such as in industrial trucks or large commercial vehicles, special traction batteries are more suitable.

Environments with extreme temperatures

Although AGM batteries can handle heat better than conventional batteries, they are more susceptible to damage at extreme temperatures, especially at very high temperatures.
Das Bild zeigt eine Grafik einer Batterie vor einem zweigeteilten, links blaue, rechts rote, Hintergrund

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Conclusion: AGM batteries - power and longevity

AGM batteries are a powerful and versatile battery technology that can impress in many areas of application. Their high performance, long service life, vibration resistance and freedom from maintenance make them an attractive choice for demanding users.

If you are looking for a reliable and long-lasting battery for your vehicle or application, you should definitely consider AGM batteries. However, bear in mind that they are not ideal for all applications and, if in doubt, consult a specialist to find out which battery is the best choice for your specific requirements.