Both Sealed Lead Acid (SLA) and Absorbed Glass Mat (AGM) batteries are designed to be maintenance-free in terms of electrolyte management, but they still require periodic care to maintain optimal performance and extend their lifespan. Here’s a detailed overview of the maintenance needs for each type.

Maintenance for SLA Batteries

Regular Checks:

• SLA batteries should be inspected at least once a month. During these inspections, check for any signs of damage, leaks, or corrosion, particularly at the terminals. Although SLA batteries are sealed, issues can still arise if the battery is exposed to extreme conditions or physical damage.

Charging:

• It is crucial to charge SLA batteries promptly after use. Ideally, SLA batteries should not be discharged below 50% of their capacity. To avoid issues like sulfation, which can occur if the battery remains in a discharged state for too long, it’s recommended to keep the battery charge above 70%. Frequent charging helps maintain the battery’s health and prevents performance degradation.

Storage:

• When stored for extended periods, SLA batteries should be recharged every six months. This practice helps maintain the battery’s condition and prevents it from becoming excessively discharged, which can shorten its lifespan.

Maintenance for AGM Batteries

Regular Checks:

• AGM batteries also benefit from regular inspections, although their sealed design makes them less prone to issues such as terminal corrosion. Monthly checks are advisable to ensure that the battery remains in good condition and to identify any potential problems early.

Charging:

• AGM batteries can handle deeper discharges—up to 80%—and should be charged immediately after use. Due to their lower self-discharge rate, AGM batteries generally require less frequent charging compared to SLA batteries. However, prompt charging is still important to maintain battery health and performance.

Storage:

• Similar to SLA batteries, AGM batteries should be stored in a charged state. They can be stored for longer periods with minimal maintenance but checking their voltage every few months is a good practice. This ensures that the battery remains in a healthy state and is ready for use when needed.

Summary

In summary, while both SLA and AGM batteries are designed to be maintenance-free in terms of electrolyte management, regular inspections and timely charging are crucial for both types. SLA batteries require more frequent attention to avoid issues related to discharge levels and sulfation. In contrast, AGM batteries generally require less maintenance due to their robust design and ability to handle deeper discharges. Proper care for both battery types ensures optimal performance and extends their lifespan.