Taboos of Using AGM Batteries

While AGM (Absorbent Glass Mat) batteries offer many benefits, there are certain practices and conditions that should be strictly avoided to ensure their longevity, safety, and optimal performance.

1. Overcharging

  • Avoid: Overcharging can cause excessive gassing, heat buildup, and potential damage to the internal structure of the battery.
  • Solution: Use a charger with an automatic shut-off feature and appropriate settings for AGM batteries.

2. Undercharging

  • Avoid: Undercharging can lead to sulfation, where lead sulfate crystals form on the battery plates, reducing capacity and efficiency.
  • Solution: Ensure regular and complete charging cycles. Use a charger that provides a full charge and maintains it with a float charge.

3. Incorrect Charger Use

  • Avoid: Using a charger not designed for AGM batteries can lead to improper charging voltages and damage.
  • Solution: Use a charger specifically designed for AGM or VRLA batteries.

4. Extreme Temperatures

  • Avoid: Exposing AGM batteries to extreme heat or cold can significantly impact their performance and lifespan.
  • Solution: Store and use AGM batteries in environments with controlled temperatures. Avoid placing them near heat sources or in freezing conditions.

5. Deep Discharges

  • Avoid: Frequently allowing the battery to discharge below 50% capacity can shorten its lifespan.
  • Solution: Recharge the battery before it drops below 50% state of charge (SoC). Use a battery monitor to track the SoC.

6. Physical Damage

  • Avoid: Dropping, puncturing, or otherwise physically damaging the battery can lead to leaks, short circuits, or complete failure.
  • Solution: Handle the battery with care, use proper lifting techniques, and ensure it is securely mounted in applications subject to vibrations or movement.

7. Incorrect Storage

  • Avoid: Storing the battery in a discharged state or in an unsuitable environment can lead to sulfation and capacity loss.
  • Solution: Store the battery fully charged in a cool, dry place. Recharge it every few months if stored for an extended period.

8. Short Circuits

  • Avoid: Allowing metal objects to bridge the terminals can cause a short circuit, leading to potential injury or battery damage.
  • Solution: Keep the battery terminals covered and free from tools or other conductive materials.

9. Ignoring Maintenance Checks

  • Avoid: Although AGM batteries are low-maintenance, completely neglecting periodic checks can lead to unnoticed issues.
  • Solution: Regularly inspect the battery for signs of damage, corrosion, and ensure the connections are tight and clean.

10. Improper Installation

  • Avoid: Incorrect installation, such as using inappropriate cables or mounting the battery in an unsupported manner, can cause performance issues.
  • Solution: Follow the manufacturer’s installation guidelines, use the correct cables, and ensure the battery is securely mounted.

11. Mixing Battery Types

  • Avoid: Mixing AGM batteries with other types (e.g., flooded, gel) in the same battery bank can lead to unequal charging and potential damage.
  • Solution: Use only AGM batteries within the same battery bank and ensure they are of the same age and capacity for balanced performance.

By adhering to these guidelines and avoiding these taboos, users can ensure their AGM batteries perform optimally, remain safe, and have a longer lifespan.


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