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An AGM (absorbed glass mat) battery contains a special glass mat separator that wicks the electrolyte solution between the battery plates. This material’s design enables the fiberglass to be saturated with electrolyte – and to store the electrolyte in a “dry” or suspended state rather than in free liquid form. As the battery works. Electric Fuel Battery Corporation is a leader in the development and production of custom portable power systems for military, industrial, medical and aerospace applications. Therefore, enhanced flooded batteries (EFBs) have been developed with deep cycle life below the AGM battery values but similar shallow cycling performance and durability and at distinctly lower cost, only 20–40% above their conventional flooded counterparts. The EFB design strategy is as follows.

What is an EFB battery Enhanced Flooded Battery in English means 'advanced liquid electrolyte battery.' The design uses thickened plates of lead, which have a large capacity and charging speed. Microfibers are filled with liquid sulfuric acid electrolyte, like an envelope, cover plates.

Milton, Georgia, March 05, 2020 (GLOBE NEWSWIRE) -- Exide Technologies, LLC (www.exide.com), announced today the launch of its new line of Enhanced Flooded Batteries (EFB) automotive batteries at Rural King locations across the country under the Rural King Premium EFB brand name. The batteries are now available in all 117 Rural King stores nationwide and online.

The new Premium EFB line of batteries offers Rural King customers a longer-lasting battery for today’s modern vehicles. Each EFB battery includes added heat protection to resist damage caused by warm climates. With 6x greater cycle life and 2x better charge acceptance than a traditional starting battery, EFB batteries are built to support advanced safety and entertainment features, such as blind spot monitoring and multiple screens in the vehicle. The batteries also come with an industry-leading four-year warranty.

“We are excited to see the Premium EFB line join Rural King’s battery offerings for their customers,” said Tom Best, Exide Technologies Strategic Account Director. “We look forward to continuing to provide Rural King with a high level of customer service and support as we partner with them to provide new and innovative battery technologies.”

“We are pleased to be the first retailer to offer our customers EFB automotive batteries in the US,” said Kyle Banks Rural King Category Manager. “EFB represents a great option for customers looking for premium performance at a more affordable price. With the EFB technology, these batteries are built to perform for years to come and the four-year warranty gives customers added confidence in the battery.”

For more information about Rural King Premium EFB Batteries, including where to purchase, visit www.ruralking.com.


About Rural King

In 1960, Rural King started as a small, family-owned farm store in Mattoon, IL. The passion and dedication of its associates pushed the company further than ever imagined. Now, the company is one of the fastest growing family-owned companies in America and has added over 120 stores in a thirteen-state area.

All store locations have a large variety of products, such as livestock supplies, clothing, hardware, and compact RK tractors from 19-74HP at select locations. Rural King is proud to provide all customers with the lowest prices every day, free coffee and popcorn in every store, and a friendly smile. To find more information about Rural King Supply and the products they carry, visit Ruralking.com or a Rural King store near you.

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About Exide Technologies


For more than 130 years, Exide Technologies, LLC (www.exide.com) has been Powering the World Forward as a global provider of stored electrical-energy solutions for the Transportation and Industrial markets. Headquartered in Milton, Georgia, Exide operates in 80 countries with more than 9,000 employees. Exide produces a range of battery and energy storage systems and specialty applications for the Transportation, Network Power and Motive Power markets and industries including agricultural, automotive, electric, light and heavy-duty truck, marine, materials handling, military, mining, powersport, railroad, security, telecommunications, utility and uninterruptible power supply (UPS), among others. As one of the world’s largest secondary recyclers, the company is committed to environmental sustainability.


What's an AGM battery, what's an EFB battery - and more importantly, what's the difference?

Here's what they are, how they work and why you might need one.

What is an AGM battery?

In technical terms AGM stands for Absorbed Glass Mat. Sytrus plugin. An AGM battery is different to regular batteries because the electrolyte liquid (battery acid) is absorbed into the glass mats like a sponge instead of the sulphuric acid being free floating as in a conventional battery.

Why would I need an AGM battery?

Many of the technologies and accessories now included in modern cars put extra demands on their batteries. AGM batteries are designed to cope with these higher energy drains and demands. For example, the Stop-Start technology featured in many modern vehicles requires a battery with a higher output and AGM batteries excel in this regard. Where Stop-Start is enabled, the vehicle’s engine cuts out instead of idling when the vehicle is stationary in order to save fuel. AGM batteries ensure that when your car has stopped, it will rapidly and seamlessly start again when you’re ready to move off.


AGM deep cycle batteries are also safe to install inside the cabin of a vehicle to run accessories, as they don’t release harmful gases. Some AGMs are dual purpose so they can also start a vehicle's engine

If your car currently has an AGM battery, then it’s important that you replace it with an AGM battery to ensure your car’s health is maintained.

AGMs have several advantages:

  • AGMs produce higher amp power output for the same size of calcium battery, meeting the increasing demands of car electrics and technologies.
  • AGMs are better suited to the modern car charging system.
  • Dual-purpose AGMs can function as both a starting battery and as an accessory battery, so they can support a multitude of new accessories and car technologies.
  • Deep-cycle AGMs are safer to install in the passenger compartments of vehicles because they’re sealed and don’t produce harmful fumes or gases.
  • Because an AGM is fully sealed it is also maintenance free.

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What is an EFB battery?

An enhanced flooded battery (EFB) can also be used in cars that feature Stop-Start technology. It is considered an entry level battery for use in cars with this technology. EFBs are wet-filled and similar to standard flooded batteries, however, there are differences that give these batteries enhanced cycling abilities and improved charge acceptance. This means the battery recovers more quickly, as its application needs to handle heavy-duty, cyclic, Start-Stop applications.

Does my car need an EFB battery?

Your vehicle will only require an EFB battery if it currently has one. For example, vehicles with Stop-Start technology may use one of these batteries. If in doubt, check with us before ordering a new battery.

Both AGM and EFB batteries are designed for the frequent cycling required when a vehicle is equipped with Stop-Start technology. Vehicle owners new to the Stop-Start feature may be concerned about the impacts of it on the battery, however, batteries that are required for this technology to function correctly are built to tolerate constant stopping and starting. It is also why replacing your battery with the correct type is essential to maintaining its performance.

What is a calcium battery?

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Calcium batteries are lead acid batteries. Inside the typical lead acid battery are lead plates in electrolyte liquid (battery acid) which creates a chemical reaction that charges the battery terminals. One of the benefits of calcium batteries is that they are less likely to be affected by extreme weather conditions and higher charge rates, so many modern cars use them to cope with the higher power demand from engines and accessories.

Does my car need a calcium battery?

Cars with calcium batteries can be replaced with calcium batteries, so like for like, but can also handle EFB and AGM batteries, which are considered an upgrade.

Need extra battery advice?

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Call our motoring advice helpline, available from Monday to Friday 9am to 5pm.

What Is Enhanced Flooded Battery

Last updated January 2021