AGM deep cycle batteries are of sealed construction and are designed to last 7 to 10 years with little maintenance, especially when compared to flooded batteries. However, understanding how to properly charge and maintain a deep cycle battery is critical to optimizing its performance and lifespan.

To help you get the most out of your deep cycle battery, we've put together a charging and maintenance guide.

Storage

Never store batteries in a discharged state, this can lead to sulfation and make it difficult to fully charge the battery. Store the battery in a cool, dry and well-ventilated place. If the storage time exceeds four months, please remember to charge it.

Prevent sulfation

When the sulfuric acid found in lead-acid batteries reacts, especially in the negative plate, it forms lead sulfate, which causes sulfation. Sulfation reduces the battery's ability to charge. Keeping AGM batteries charged during and before storage will help avoid the vulcanization process. If sulphation occurs on your AGM battery, use a desulfurization charge to reverse the sulphate. You can also use a charger recommended for AGM batteries to reduce the effects of sulfates.

Don't overcharge

The internal structure of AGM batteries can be damaged by overcharging. Also, AGM batteries will have a shorter lifespan due to insufficient charging. To efficiently charge an AGM battery, follow the manufacturer's instructions for the correct voltage.

Use the charger recommended by the manufacturer

Every AGM battery comes with a charger recommended by the manufacturer. The manufacturer's charger ensures that AGM batteries are not undercharged or overcharged to the recommended voltage. If the wrong charger is used, it can cause sulfuration of AGM batteries.

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