What you need to know about EFB's (Enhanced Flooded Batteries)

07 Jul.,2025

 

What you need to know about EFB's (Enhanced Flooded Batteries)

EFB batteries are an enhanced version of standard wet-flooded technology. These type of batteries should not be confused with standard flooded or AGM batteries.

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The primary benefits of EFB technology are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge.

EFB batteries have been introduced as a lower tier option to AGM batteries in terms of performance and durability. EFB technology relies on improvements to existing flooded technology through the addition of Carbon additives in the plate manufacturing process. AGM batteries benefit from the inclusion of unique design features not found in wet-flooded batteries. These include glass mat separators, recombinant lid technology and higher pack pressures to facilitate improved cyclic lifespan. AGM batteries are better suited to meeting the demands of higher specification vehicles that include one or more of the following technologies: Start Stop, Regenerative Braking and Passive Boost.

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Standard Flooded | Autobatteries.com

Standard Flooded Technology for Car and Truck Batteries: The standard flooded battery is the most common type of auto battery. It provides power to reliably start your vehicle and provide power for standard vehicle electrical accessory loads. A standard flooded battery is designed to supply power to the starter and ignition system to start the engine. It also supplies extra power when the vehicle’s electrical load exceeds the supply from the charging system. It provides power to electrical systems such as the clock and computer systems when the vehicle isn’t running. And it evens out voltage spikes and prevents damage to other parts of the electrical system. In a standard vehicle, the Starting, Lighting, Ignition (SLI) battery is kept at a high state of charge (SOC), so it doesn’t require deep-cycling capabilities. Most batteries today are standard flooded batteries.Standard Flooded Battery Applications: Standard flooded batteries are ideal for vehicle applications with normal electrical demands.Standard Flooded Battery Construction: 12-volt lead-acid batteries are made up of six cells. Within each cell, positive and negative plates are stacked in an alternating fashion, separated by a thin sheet of microporous plastic called a separator. The stacked plates are immersed in an electrolyte solution, or battery acid, which surrounds the separators and the plates, providing a path for electricity to flow.

Standard Flooded Battery Benefits:

  • Reliable starting power
  • Basic charge acceptance
  • Suitable for all climates
  • Lowest-cost option

Standard Flooded Battery Disadvantages:

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