Pros & Cons Of AGM Batteries

Absorbent glass mat batteries (AGM) have been a market favorite for the past few decades. At the time, they were designed to be a viable alternative to the Ni-Cad batteries, which were very costly. Though they were mainly used in military vehicles as a source of back up power and heavy vehicles such as long-distance trucks, nowadays, they have more diversified uses. In principle, the AGM batteries work like any other lead battery. However, the AGM batteries, compared to flooded batteries, have several significant improvements that make them more efficient. Additionally, just like other types of batteries in the market, they have their advantages and disadvantages.

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Advantages of AGM

1. They are spill-proof

Unlike the traditional lead-acid batteries that freely flood their electrodes, AGM batteries have glass mats that prevent this. Additionally, it is the function of these glass mats to avoid spillage. Rather than absorbing the electrolyte, the glass mats work by holding the electrolyte in place, preventing it from spilling over, even when the battery is placed in odd positions.

2. They have a high-power output.

Because of the way that they are designed, the AGM batteries have minimal internal resistance. This, therefore, enables them to provide sufficient bursts of power when necessary, such as when one needs to start a battery. Due to this feature, these batteries respond better to loading than any other battery on the market.

3. They have a short charging time.

AGM batteries, compared to flooded batteries, charge quickly. When compared to flooded batteries of a similar capacity, the charging rate can reach five times faster with the same power source.

4. They have a longer lifespan

AGM batteries have a longer lifespan than traditional flooded batteries. Moreover, not only do they serve for a more extended period when they perform the same tasks, but they also last longer when they are not in active use. This is because self-discharging is minimized in these batteries, unlike other types of batteries, which is a huge problem. This ensures that one does not have to keep charging them after an extended period of inactivity.

5. They are durable.

These AGM batteries were originally designed to serve the aircraft industry. This means that they have a sturdy design, one that can handle conditions of intense vibrations, just like those in military and commercial aircraft. Because of this property, they are a favorite for high-end motorcycle riders and race car drivers. The sandwich construction method adopted in their design ensures that their internal components do not fall apart. Moreover, they are invulnerable to the subsequent wear and tear that may result from frequent and continuous vibrations. Furthermore, they can withstand extreme temperature variations.

6. They are unlikely to build up sulfation

Sulfation is the property of lead-acid batteries, where there is a gradual accumulation of lead sulfate crystals in the cells. In most cases, it is the cause of failure in lead-acid batteries. Sulfation mostly occurs when the battery is not fully charged, and thus the crystals continuously build up on the plates. When this process goes out of hand, it prevents the efficient conversion of chemical to electrical energy. Therefore, for other types of lead-acid batteries, it is essential to charge them every six months to prevent sulfation. However, in AGM batteries, sulfation is significantly reduced. Therefore, they can be stored for extended periods without needing a recharge.

Despite their many advantages, AGM batteries, just like other lead-acid batteries, also have their disadvantages. These include:

1. High production cost

Unlike the flooded batteries, AGM batteries have a higher production and manufacturing cost. However, they are still cheaper to produce than gel type batteries. Even though the cost of manufacturing these batteries has reduced since their introduction into the market in the 80s, it is still generally higher when compared to other battery types in the market. This, therefore, make them slightly expensive for use in some devices.

2. Energy issues

While these AGM batteries have a high-power output, they have a low specific energy. Generally, it is a necessity for batteries that are required to run for a long time under a moderate load to have a high specific load. This means that these batteries cannot be used on several devices.

3. Reduced capacity over time

Though AGM batteries keep a charge for a longer time than other batteries, they gradually reduce their charging capacity over time. This is unlike gel batteries that have an advantage in this sector because of their excellent performance dome.

4. They are sensitive to overcharging

These AGM batteries, compared to flooded batteries, have a low tolerance to overcharging and high voltages. If they are subjected to these conditions, it shortens their life span.

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Have you ever wondered how car batteries and truck batteries are different? In this article, we will explore the distinct characteristics of each type of battery. Understanding these differences is important because it helps us choose the correct battery for our vehicles. Let&#;s dive into the world of car and truck batteries to see what makes each unique.

Part 1. Understanding car batteries

A car battery is a vital component that provides electrical energy to start the engine and power various vehicle systems. It consists of lead-acid cells submerged in an electrolyte solution, facilitating the storage and release of electrical charge.

Key components and their functions:

• Lead plates: Provide structural support and conductive surfaces for storing and releasing electrical energy.
• Lead dioxide and sulfuric acid electrolyte: Facilitate chemical reactions necessary for energy conversion.
• Casing: Encloses and protects internal components from damage.
• Terminals: Connect to the vehicle&#;s electrical system for power distribution.

Types of Car Batteries

Car batteries are available in different types, each suited for specific vehicle applications based on performance requirements and environmental conditions.

Standard Lead-Acid Batteries:

• Advantages: Cost-effective, reliable starting power, suitable for most gasoline and diesel engine vehicles.
• Disadvantages: They require periodic maintenance (e.g., checking electrolyte levels) and are vulnerable to deep discharges.

AGM (Absorbent Glass Mat) Batteries:

• Advantages: Maintenance-free, spill-proof design, longer lifespan, suitable for vehicles with high electrical demands (e.g., luxury cars, modern sedans).
• Disadvantages: Higher initial cost compared to standard lead-acid batteries.

Lithium-Ion Batteries:

• Advantages: Lightweight, compact, high energy density, longer lifespan, ideal for hybrid and electric vehicles.
• Disadvantages: Expensive, sensitive to temperature extremes, requiring specialized management systems.

Part 2. Understanding truck batteries

Truck batteries are specialized energy storage units designed to meet the higher demands of commercial vehicles and trucks. They differ significantly from car batteries in construction and capacity to handle the rigorous requirements of heavy-duty applications.

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Truck-specific battery requirements:

• Built to withstand frequent starts and stops, typical in truck operations.
• Must provide ample power to support additional electrical loads such as lighting, air conditioning, and onboard electronics.
• They withstand vibration and shock from rough road conditions.

Differences in construction and capacity:

• Construction: Often larger and heavier than car batteries to accommodate higher capacity and robustness.
• Plate thickness: Thicker plates can withstand deeper discharge cycles and prolonged usage.
• Internal structure: Reinforced casing and terminals to endure vibrations and prevent damage.

Types of Truck Batteries

Truck batteries come in several types, each tailored for specific operational needs and vehicle configurations.

Heavy-Duty Batteries:

• Overview: Designed for commercial trucks and vehicles with large diesel engines.
• Application scenarios: Ideal for long-haul trucks, buses, and construction equipment requiring reliable starting power and durability.
• Optimal uses: Well-suited for frequent starting and stopping cycles and extended periods of idling.

Deep-Cycle Batteries:

• Overview: Built to provide sustained power over extended periods without significant voltage drop.
• Application scenarios: Used in trucks with auxiliary equipment like refrigeration units, lift gates or hydraulic systems.
• Optimal uses: Perfect for powering accessories during prolonged stops or when the engine is off.

Dual-Purpose Batteries:

• Overview: Designed to provide reliable starting power and the capability to handle moderate auxiliary electrical loads in trucks and vehicles with mixed usage requirements.
• Application scenarios: Suitable for trucks needing robust starting power and the ability to handle accessory loads.
• Optimal uses: Commonly found in medium-duty trucks and vehicles with moderate electrical demands.

Part 3. Critical differences between car and truck batteries

When comparing car batteries to truck batteries, several critical distinctions influence their performance and suitability for different vehicle types. Understanding these differences helps select the most appropriate battery for specific vehicle needs.

1. Size and Capacity:

Car batteries are typically smaller and have lower capacity, so they are suitable for powering standard vehicle electrical systems. In contrast, truck batteries are more extensive and designed to handle higher electrical demands due to additional accessories and larger engines.

2. Power Output:

Truck batteries often feature higher Cold Cranking Amps (CCA), providing robust starting power for larger engines and frequent starts. Car batteries have lower CCA ratings suitable for smaller engines and typical driving conditions.

3. Plate Thickness and Grid Structure:

Truck batteries are constructed with thicker plates and more robust grid structures to withstand vibrations and shocks encountered in heavy-duty applications. Car batteries have thinner plates optimized for lighter usage.

4. Internal Components:

Truck batteries may include additional internal components to support heavy electrical loads and extended usage, such as reinforced terminals and casing materials. Car batteries focus on compact designs for efficient space utilization.

5. Cold Cranking Amps (CCA):

CCA ratings for truck batteries are higher to ensure reliable engine starts in cold weather conditions and intensive usage scenarios. Car batteries have lower CCA ratings that are sufficient for typical driving conditions.

6. Reserve Capacity:

Truck batteries generally have a higher reserve capacity to sustain power output for longer durations, accommodating frequent idling and auxiliary equipment. Car batteries offer sufficient reserve capacity for standard driving needs.

7. Charging Requirements:

Truck batteries may require specialized charging systems to effectively manage their larger capacities and specific charging cycles. Car batteries typically have more straightforward charging requirements.

8. Maintenance Needs:

Truck batteries require less frequent maintenance due to their robust design and higher tolerance for deep discharges. Car batteries may need periodic electrolyte checks and occasional recharging to maintain optimal performance.

Part 4. FAQs 

• Can I use a car battery in a truck?
  

  Experts do not recommend using car batteries for trucks because they have lower capacity and cannot handle the higher electrical demands of truck engines and accessories.

• How do I know if my truck battery needs replacement?
  

  Look for signs like difficulty starting the engine, dim headlights, or electrical malfunctions. Regular testing helps catch issues early.

• How often should I replace my truck battery?
  

  Typically, truck batteries last 3 to 5 years, depending on usage and conditions. Replace as needed to avoid unexpected failures.

• Do truck batteries need special maintenance?
  

  Yes, regular checks of electrolyte levels, clean terminals, and proper charging methods are crucial for optimal truck battery performance.

• What should I do if my truck battery dies?
  

  Jump-start with cables or a portable starter. Consider testing and replacing if problems persist to avoid vehicle downtime.

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Henry

Battery Industry Content Writer

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