SLA vs AGM Batteries: Which Is the Best Fit for Your Application?

Are you in the market for a new battery and wondering which one to choose? SLA and AGM batteries are two popular options, but how do they differ? Which one is better suited for your needs? Don’t worry – we’ve got you covered! In this blog post, we’ll explore the differences between these two types of batteries and help you determine which one is the best fit for your application. So let’s dive in!

What is an SLA battery?

An SLA battery is a lead acid battery that uses a porous microfiber separator between the positive and negative plates. The separator is designed to allow oxygen to pass through it, which recombines with the electrolyte to form water. This process is called “oxygen recombination” and it significantly extends the life of an SLA battery.

SLA batteries are often used in applications where long life and maintenance-free operation are important, such as in backup power systems, solar energy systems, and industrial equipment.

What is an AGM battery?

An AGM battery, also known as a VRLA or valve regulated lead acid battery, is a type of rechargeable battery that uses Absorbent Glass Mat technology to minimize the risk of spillage and leakage. The electrolyte in an AGM battery is suspended in a fiberglass mat, which allows for more stable performance and longer life span than traditional lead acid batteries.

AGM batteries are typically used in high-end applications such as golf carts, trolling motors, and UPS systems due to their higher power density and longer life span. However, they are also becoming increasingly popular in lower-end applications such as RVs and boats due to their superior performance compared to traditional lead acid batteries.

Which is better for long-term use?

SLA batteries are more popular for long-term use because they are less expensive and require little maintenance. AGM batteries are more expensive but last longer and require very little maintenance.

Which is better for deep-cycling?

The best battery for deep-cycling is the SLA battery. This is because it can withstand being discharged and recharged multiple times without damaging the battery. The AGM battery is not as durable and can be damaged if it is discharged too deeply.

Which is better for high-temperature use?

There are a few factors to consider when choosing a battery for high-temperature use. The first is the self-discharge rate; at higher temperatures, batteries discharge faster. The second is capacity; at higher temperatures, batteries have reduced capacity. And the third is resistance; at higher temperatures, batteries have increased internal resistance and therefore reduced power output.

SLA batteries have lower self-discharge rates and higher capacity than AGM batteries at high temperatures. However, they also have higher internal resistance, which means they may not perform as well as AGM batteries in some applications.

AGM batteries have lower self-discharge rates and higher capacity than SLA batteries at high temperatures. However, they also have higher internal resistance, which means they may not perform as well as SLA batteries in some applications.

So, which is better for high-temperature use? It depends on the application. If power output is most important, then an AGM battery may be the better choice. If long life and low maintenance are most important, then an SLA battery may be the better choice.

Differences between SLA and AGM batteries

When it comes to batteries, there are a few different types on the market. Two of the most popular options are SLA (sealed lead-acid) and AGM (absorbent glass mat) batteries. Both of these battery types have their own advantages and disadvantages, so it’s important to understand the difference between them before making a purchase.

SLA batteries are typically less expensive than AGM batteries, but they also require more maintenance. SLA batteries need to be regularly checked for water levels and voltage, and they should be given a full charge every few months to prevent sulfation. AGM batteries, on the other hand, are sealed and require no maintenance other than occasional cleaning. They’re also more resistant to vibration and shock, making them ideal for use in RVs, boats, and other vehicles.

AGM batteries typically last longer than SLA batteries, but they cost more up front. If you’re looking for a battery that requires little to no maintenance and will last for several years, AGM is the way to go. However, if you’re on a budget or don’t mind putting in a bit of extra work to maintain your battery, SLA may be the better option.


Both SLA and AGM batteries are excellent choices depending on your specific needs, so it is important to consider what you will use them for before making a decision. Ultimately, the best battery technology depends on the application – whether you need something light weight, powerful or maintenance-free. SLA batteries offer flexibility in terms of sizing options and can be recharged relatively quickly but may not last as long as AGM batteries. On the other hand, AGM batteries provide more efficiency and longevity than their counterparts but tend to be heavier and require more frequent charging cycles.