Marine AGM deep-cycle batteries combine deep cycling capability to provide a longer sustained discharge, and frequent cycling and recharging without sacrificing durability and battery life. This allows the battery to be repeatedly discharged to a lower state of charge and recharged without significant capacity loss, while also providing appropriate amounts of power for starting engines and operating onboard electronics and accessories. Widely used in marine applications, the sealed design allows AGM batteries to hold their charge for extended periods, even when the watercraft is not in use. Vibration resistance also ensures their durability in rough or choppy water conditions, making them the perfect battery for marine environments.
Absorbed glass mat (AGM) batteries are a type of sealed lead-acid battery designed to provide superior power delivery and storage capacity, and are known for excellent vibration resistance and an ability to withstand deep power discharges without sustaining long-term damage. This makes AGM batteries ideal for use in automobiles, marine applications, recreational vehicles, renewable energy systems, and other environments that demand reliable battery performance and maximum durability.
The term “absorbed” or “absorbent glass mat” refers to the highly absorbent, micro-porous mat separators inside the battery case which are made of specialized glass microfiber. These mats are placed between the battery’s positive and negative plates to absorb the battery’s electrolytic acid and allow power to be stored and transferred through the battery. This absorption of battery acid creates a spill-proof and maintenance-free design and keeps the electrolytes evenly suspended around the plates for maximum cranking power, while protecting the plates from deep discharge and vibration damage.
There are a variety of advantages to using an AGM battery in place of a traditional flooded lead-acid battery, especially if you subject the vehicle to extreme temperatures, rough terrain, or long periods of accessory power discharge. Below are a few of the most notable benefits of AGM batteries.
- Spill-Proof Design: Unlike lead-acid batteries, which can be susceptible to acid leakage if not handled appropriately, AGM batteries are completely sealed and spill-proof.
- Low Risk of Corrosion: The spill-proof sealed design of AGM batteries also reduces the risk of corrosion on battery terminals and nearby components caused by acid leaking from the battery case. This means that battery terminals and battery trays can experience longer life due to a lack of corrosion or damage over time.
- High Heat Tolerance: AGM batteries have better heat resistance than lead-acid batteries, and have been proven to last longer under high temperature exposure. This helps to provide improved performance and reliability for vehicles that are often operated in high-temperature climates.
- Low Self-Discharge: AGM batteries are able to maintain a reserve charge for extended periods of time while not in use. This makes them the best choice for vehicles that may sit idle during the year, such as recreational vehicles, collector vehicles, motorcycles, boats, or other powersports or seasonal vehicles.
- Vibration Resistance: AGM batteries are manufactured to withstand damage from vibrations and irregular movement while navigating rough driving conditions, and are especially well-suited for vehicles that experience uneven terrain such as off-roading or marine applications.
Marine AGM Deep-Cycle Batteries
Is Upgrading to an AGM Battery Worth It?
Choosing a battery with absorbed glass mat technology (AGM) is definitely worth the investment for certain applications. Made for superior performance and durability, AGM batteries are a popular choice for vehicles and equipment with high electrical system demands, especially when deep-cycling capability is required. AGM batteries offer several advantages over traditional batteries, such as a longer lifespan, and better resistance to vibration and shock. While AGM batteries typically have a higher upfront cost, the benefits and savings over time can make them a worthwhile battery replacement or upgrade.
How Long Do AGM Batteries Typically Last?
The lifespan of a battery can have a wide range because every application is different, and a variety of factors could influence how long a battery can provide appropriate power. An AGM battery’s life can be influenced by the type of vehicle, its usage, driving conditions, vibration exposure, temperature, and charging practices. However, it’s generally accepted that if battery usage conditions are similar and the battery is properly maintained, then it’s possible for an AGM battery to last up to twice as long as a traditional flooded-cell battery. Regularly charging and limiting the amount of deep discharges can potentially extend an AGM battery’s life even further.
How To Charge An AGM Battery
When charging an AGM battery, it’s essential to use a battery charger specifically designed for use with AGM applications. AGM batteries should not be charged in the same way as typical lead-acid batteries, because AGM batteries charge better and faster at low voltages and do not require high-voltage charging. Charging voltage should not exceed 13.8 to 14.8 volts and 30 amps when charging an AGM battery to prevent battery damage and ensure the best charging performance. Some battery chargers may have a specific AGM setting or mode that can be selected to ensure appropriate voltage while charging. Attempting to use a charger that is not made for AGM charging can potentially overcharge an AGM battery, resulting in a buildup of pressure and a damaged safety valve. Though this valve is intended to vent gas buildup, if it is damaged, it can dry out the battery and cause it to no longer operate. At O’Reilly Auto Parts we carry a wide selection of AGM-compatible battery chargers for your charging needs.
Are AGM Batteries Deep Cycle-Capable?
Yes, AGM batteries are a great choice for deep-cycle applications and are commonly used in marine applications, RVs, golf carts, and other electrical systems that benefit from deep-cycling capability. Their consistent power output, ability to handle repeated deep discharges with minimal capacity loss, and maintenance-free design makes AGM batteries a reliable option for these types of applications.
When considering a replacement battery for your vehicle, it's important to understand the differences between AGM batteries and other types of batteries that may be available. AGM batteries offer numerous advantages, including longer lifespan, maintenance-free operation, and reliable performance for most situations that demand high-output electrical power. At O'Reilly Auto Parts, we offer a wide range of AGM batteries to meet your specific needs, such as Super Start Platinum AGM batteries, as well as AGM marine and deep-cycle battery options. Shop online, or visit the nearest O’Reilly Auto Parts store and let our Professional Parts People™ help you find the best replacement AGM battery for your vehicle.