One of the advantages of an AGM battery is they can be charged up to five times faster than a standard flooded battery. However, AGM is also the technology we use in our general purpose (PS) and long life (PG) families of products as the Absorbent Glass Mat separator maximizes the surface area of the electrolyte improving battery performance.Įach cell in an AGM battery has 2 volts so AGM batteries are available in a variety of voltages including popular 6V and 12V models. AGM batteries are also being used as start-stop batteries in modern cars, this is due to flooded batteries not being robust enough to handle the repeated cycling in start-stop applications which can cause the battery to fail after only a couple of years use.įor example, at Power Sonic we offer our AGM technology in both deep cycle AGM batteries (the PDC line) and as a popular option in our PowerSport family (Super Sport, Ultra Sport AGM, and our Stop-Start AGM lines). This is because it has low internal resistance and can provide high current loads quickly. While a popular choice for deep cycling, as an AGM battery has a depth of discharge (DoD) of 80% versus a standard flooded battery which has a DoD of 50%, it is also a popular choice for starter batteries. However, not all AGM batteries are deep cycle. When most people think of AGM batteries, they likely think of deep cycle battery applications. This allows for less electrolyte in the battery while still providing the same energy as traditional SLA batteries.
CHARGING AGM DEEP CYCLE BATTERIES FREE
AGM batteries contain only enough electrolyte to keep the mat wet and if the battery is broken no free liquid is available to leak out. The AGM battery holds the electrolyte in place and works by allowing the electrolyte to be passed through the fiberglass mat, creating maximum surface area for the electrolyte to touch the plates without it flooding the battery with too much fluid. Since the mat acts like a sponge with the electrolyte, the battery becomes non-spillable. In AGM type batteries, the construction follows the same basics as standard SLA, with the addition of a fiberglass mat that is placed between each negative and positive plate to absorb the electrolyte. Because they are sealed, you don’t need to add electrolyte after the manufacturing process, and any gases that are generated go into a recombination cycle. Although these batteries allow gases to escape, they are spill-proof batteries (sometimes called valve regulated lead acid or VRLA), and allow for safe operation in almost any position (the only limitation is they are not recommended to be used upside down).
Some of these batteries are also valve-regulated, which allows for the escape of minor amounts of gas that occurs during the recombination process during charging. All SLA batteries are comprised of lead plates (positive and negative) and electrolyte that are then arranged into “cells” and placed into a battery case. Let’s review some basics of the SLA (sealed lead acid) battery construction. But, what does Absorbent Glass Mat (AGM) actually mean and how does that enhance the battery’s performance over standard lead acid batteries? You’ve heard the term AGM battery before and may even know that it stands for Absorbent Glass Mat.
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