How to Properly Store & Maintain Your AGM Batteries

AGM (Absorbed Glass Mat) batteries are a solid choice for off-grid adventures, offering reliable power for your 12V system, whether you're deep in the outback or camping by the coast. But like any piece of gear, they require proper care to ensure they last the distance. If you want your AGM batteries to keep performing at their best, knowing how to store and maintain them is crucial. Here’s how to do it right.

1. Keep Your AGM Batteries Charged

One of the biggest mistakes you can make with an AGM battery is letting it discharge too much. Unlike traditional lead-acid batteries, AGMs don’t like being fully drained. To keep them in top shape, always recharge them as soon as possible after use. A good rule of thumb is to keep them above 50% charge at all times. If you’re not using them for an extended period, give them a top-up charge every few months to prevent them from dropping below a safe level.

2. Store in a Cool, Dry Place

Temperature plays a huge role in the lifespan of your AGM battery. While AGM batteries perform much better in cold weather compared to lithium batteries, freezing temperatures can still have an impact. High temperatures can cause the electrolyte inside to evaporate, reducing the battery's efficiency and lifespan. Ideally, you should store your AGM batteries in a cool, dry place, away from direct sunlight and extreme cold. If you’re storing your battery in a vehicle or camper, make sure it’s in a well-ventilated area to avoid heat buildup.

3. Avoid Deep Discharges

AGM batteries are designed to be deep-cycle batteries, meaning they can be discharged and recharged many times. However, repeatedly discharging them too deeply can shorten their lifespan. If possible, avoid letting your battery drop below 20% charge. Monitoring your battery status via a Battery Monitoring Shunt can help you keep track of your battery’s charge level, ensuring you recharge it before it gets too low.

4. Check the Battery Terminals

Over time, the terminals on your AGM battery can become corroded or dirty, which can lead to poor performance. Regularly inspect the terminals and clean them if you notice any buildup. A simple mix of baking soda and water applied with a toothbrush can help remove any corrosion. After cleaning, apply a light coating of petroleum jelly or a terminal protectant to prevent future corrosion.

5. Use the Right Charger

Using the right battery charger is key to maintaining your AGM battery. Ensure your charger is compatible with AGM batteries to ensure it receives the right amount of charge. Avoid using a charger with a too-high voltage, as this can damage the battery. Our KickAss 12V 22Amp Battery Charger has a 9 stage automatic smart charging process which will automatically detect the status of any AGM battery, and ensure it is charged optimally. It also features a trickle charge mode to keep your battery topped up without overcharging it.

6. Periodically Test the Battery

Even with the best care, AGM batteries will degrade over time. To make sure yours is still up to the task, periodically test its voltage with a Multimeter or take it to a professional for load testing. This will give you an idea of how much life is left in the battery and whether it’s time to start thinking about a replacement.

Final Thoughts: Give Your AGM Batteries the Care They Deserve

AGM batteries are an investment in your off-grid lifestyle, providing dependable power for all your adventures. By following these simple storage and maintenance tips, you can ensure your batteries stay in peak condition, ready to deliver power whenever and wherever you need it. After all, a well-maintained battery means more time enjoying the great outdoors and less time worrying about your power supply.

FAQ: How to Properly Store & Maintain Your AGM Batteries

What’s the difference between AGM & Lithium batteries?

AGM (Absorbent Glass Mat) batteries are a type of lead-acid battery that uses a glass mat to absorb the electrolyte, making them spill-proof and suitable for various uses, including automotive and marine applications. They are heavier, have lower energy density, and typically require more frequent charging compared to Lithium batteries. Lithium batteries, on the other hand, are lighter, have a higher energy density, and provide a longer lifespan. They also offer faster charging, deeper discharge capabilities, and are more efficient overall, but they are generally more expensive upfront.

Can you charge an AGM battery with a regular charger?

It’s possible to charge an AGM battery with a regular charger, but it’s not recommended unless the charger has an AGM or deep cycle setting. Regular chargers may not be optimised for AGM batteries and could overcharge them, leading to reduced performance and a shorter lifespan. For the best results, use a charger specifically designed for AGM batteries, or one with a smart charging feature that can automatically adjust to the battery’s needs.

What is the life expectancy of an AGM battery?

The life expectancy of an AGM battery typically ranges from 3 to 7 years, depending on usage, maintenance, and charging practices. Regular charging, avoiding deep discharges, and ensuring the battery is kept in a moderate temperature environment can help maximise its lifespan. Proper care and maintenance are essential for getting the most out of your AGM battery.

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