Benefits of Sealed Lead Acid Batteries (SLAB)

Sealed lead-acid batteries offer a range of advantages over their flooded counterparts and other battery types. Below, we will explore the benefits of these batteries in detail.

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Key Advantages of Sealed Lead-Acid Batteries

• Charge retention is significantly improved, boasting three times better retention due to reduced self-discharge rates.
• AGM batteries are shipped fully charged and electrically tested for high rate and C1 performance.
  • In contrast, flooded batteries require activation and testing at the time of installation, which can be time-consuming and labor-intensive.
• Sealed lead-acid batteries are non-spillable, even when turned upside down, and do not cause airframe corrosion from electrolyte spillage.
• These batteries are maintenance-free as oxygen and hydrogen gases recombine during charging instead of venting into the atmosphere. This eliminates the need for water replenishment.
• The plates are highly compressed between AGM and PolyGuard® separators, reducing internal resistance and increasing conductivity, which enhances engine and APU starting power.
• Increased battery capacity is achieved by preventing active material shedding due to plate compression and the AGM casing. This results in larger plates with more surface area and more starting power.
• Sealed lead-acid batteries produce less than 2% hydrogen gas during severe overcharge, making them safe.
  • For context, hydrogen is flammable in air at 4.1%.
• These batteries are classified as non-dangerous based on independent laboratory testing and have passed DOT shipping requirements for hazardous materials (49 CFR Section 173.159), making them unrestricted for shipment.

Advantages vs. Nickel Cadmium Batteries

• Reduced cost of ownership:
  • SLAB batteries have a lower acquisition cost and no replacement part requirements.
• They do not suffer from memory effect, eliminating the need for time-consuming cycling, thus reducing downtime.
• Gases recombine within AGM batteries, so no water replenishment is needed.
• There is no risk of "Thermal Runaway," thus no overtemperature detection system is required.
• RG® series batteries charge without fading on a constant potential bus.
• Performance in cold weather is equal to or better than nickel-cadmium batteries.
• 100% recyclable and classified as non-dangerous, meeting DOT shipping requirements for hazardous materials (49 CFR Section 173.159).

Distinct Advantages of Concorde's RG Series Batteries

For more information, please visit What’s a Sealed Lead-Acid Battery.

• Lower internal resistance and improved charge retention due to Concorde’s RG® technology, featuring larger-than-industry-standard intercell connections, plate compression, and increased electrical conductivity.
• Exclusive Polyguard® separators provide additional protection against shock and vibration, improving compression and reducing internal resistance.
• Utilizes copper terminals, bolts, and washers instead of lead terminals and steel bolts, reducing corrosion and improving current conductivity.

Can Lead-acid Batteries Compete in Modern Times?

Lead-acid batteries, invented by Gaston Planté in 1859, remain relevant today for applications like cars, wheelchairs, golf carts, and UPS systems. Despite newer chemistries, lead-acid batteries offer a cost-effective solution for many uses. While they cannot be fast-charged and have limitations on deep cycling, they continue to be a dependable and durable option for certain applications.

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Advantages

• Inexpensive and simple to manufacture.
• Mature, reliable, and well-understood technology, offering durability and dependable service.
• The self-discharge rate is among the lowest of rechargeable battery systems.
• Capable of high discharge rates.

Limitations

• Low energy density limits use to stationary and wheeled applications.
• Cannot be stored in a discharged condition as the cell voltage should never drop below 2.10V.
• Suitable mainly for standby applications due to limited full discharge cycle numbers.
• Environmental concerns due to lead content and electrolyte.
• Flooded lead-acid batteries face transportation restrictions and spillage concerns.
• Improper charging can lead to thermal runaway.