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What Is A Deep Cycle Battery?
A deep cycle battery is specially engineered to provide steady and reliable power over long periods of time. Unlike a standard car battery, which delivers a short burst of energy to start an engine, deep cycle batteries are built to be discharged and recharged repeatedly without damaging the battery. This design allows them to handle frequent deep discharges, often down to 50% or more of their capacity, and then recharge safely.
This makes deep cycle batteries ideal for applications where energy is drawn continuously, such as running fridges, lighting, inverters, or communication equipment. Whether you’re travelling off-grid, living in a motorhome or building a solar setup, a deep cycle battery provides dependable power when you need it most.
Types of Deep Cycle Batteries
There are different variations of deep cycle batteries, each made for unique purposes and delivering different levels of performance.
AGM Deep Cycle Batteries
An AGM deep cycle battery, also known as an Absorbed Glass Mat battery, is one of the most popular choices for caravans, marine vehicles and 4WD vehicles. AGM batteries use a sealed design that makes the battery leak-proof and maintenance-free, making them a great choice for anyone looking to avoid having to do frequent maintenance.
At Every Battery, we stock top brands, such as Century, Delkor, Full River, Pure Energy, Victron, Lifeline, Motivaction, Ritar, and Many More.
AGM batteries are known for their reliability and stable performance across a wide range of conditions. They’re well-suited for those who want a robust, dependable deep cycle battery without dealing with the complexity or higher upfront cost of lithium batteries.
Lithium Deep Cycle Batteries
A lithium deep cycle battery offers advanced performance for those who want maximum efficiency from their batteries. Lithium batteries are much lighter than traditional deep cycle batteries and provide more usable capacity per charge.
They also charge faster, tolerate deeper discharges, and can generally last much longer. This makes lithium deep cycle batteries the ideal choice for serious touring, off-grid solar systems and any weight-sensitive setups.
At Every Battery, we only supply Lithium batteries with a built-in battery management system (BMS) to ensure safety and reliability. All of our Lithium batteries are safe, and most come with an internal BMS (Victron has a separate BMS in some batteries). We have a wide range of brands, all of which are top quality (Pure Energy, HiMassi, K2, Victron Energy, etc).
Note: We have seen many cheap, dangerous lithium batteries recently (we open and test them), which often work for a few trips but have much lower capacity than rated, and which pose a risk of fire if used at the stated current rating. Many of them come with long warranties from suppliers who have since disappeared. Our Advice is to buy your Lithium Deep Cycle replacement batteries from a battery specialist with a long track record and great reviews – i.e. buy them from Every Battery and have the peace of mind that comes from good advice and excellent backup.
Lead Crystal Batteries
A lead crystal battery is an advanced type of traditional lead-acid technology, designed to deliver greater reliability, safety, and longevity in demanding applications. One of the key advantages of lead crystal batteries (or Crystal Gel batteries) is their ability to handle deep discharges without shortening their lifespan, making them well-suited to intermittent use scenarios such as seasonal touring, camping, or backup power systems. Instead of liquid acid, these batteries use a solidified Gel electrolyte, which significantly reduces the risk of leakage, sulphation, and performance degradation over time.
Call our team to get batteries from trusted brands including Deka, Lifeline, Pure Energy, Sonnenschein, Ritar, Trojan and many more top brands. Whether you need a battery for your Golf Cart, a Marine application, your live-in Motorhome, or just to go camping in your 4×4 or Campervan, we have the best deep cycle batteries at the cheapest prices.
12V Deep Cycle Batteries
12V deep cycle batteries (Traditional Flooded, or Lead Acid) can be used in Golf Carts, some Industrial Equipment (scissor lifts, floor scrubbers), and also many caravans, boats, and home solar systems. They can be connected in series to provide 12 Volt, 24 Volt, or 48 Volt systems in some cases. A 12V system is versatile, widely supported and easy to integrate with chargers, solar regulators, and other accessories.
Choosing the Right Deep Cycle Battery
Selecting the right battery will depend on your specific usage and shouldn’t be determined solely by its capacity or price. Several factors to consider include the battery’s discharge depth, charging method, available space, and the long-term use of the battery.
If you would like to determine which deep cycle battery you need for your vehicle or setup, visit your closest Every Battery store, and our friendly team will help simplify the process and recommend a battery that is best suited for your equipment.
Why Buy Your Deep Cycle Battery from Every Battery?
At Every Battery, we have the widest range of deep cycle batteries across Australia, with a huge range of AGM, Lithium, Gel and Lead-Crystal Deep Cycle batteries in our battery shops in Melbourne, Sydney, Perth, Gold Coast, Hobart & more.
Our team also provides in-store services such as battery testing, fitting, and replacement to meet all your battery needs, conveniently.
Contact us today for more information.
Deep Cycle Battery FAQs
No, standard car batteries are not deep cycle batteries. They are designed to deliver short bursts of power for starting engines and are not built to handle repeated deep discharges.
No, not all lithium batteries are deep cycle batteries. Only lithium batteries specifically designed for deep cycle use, typically LiFePO₄ batteries with a built-in BMS, are suitable for repeated deep discharge and recharge cycles.
AGM deep cycle batteries aren’t necessarily better, but they are well-suited to many applications. They offer maintenance-free operation, good durability and reliable performance. Lithium batteries may be a better option for users seeking lighter weight, faster charging and longer lifespan.
Yes, a deep cycle battery can be charged while it’s being used, such as when running appliances while connected to solar or a vehicle alternator. The charging system simply needs to be capable of keeping up with the power draw.
Testing a deep cycle battery involves checking voltage, capacity and overall condition. While basic voltage checks can be done at home, a proper capacity or load test provides a more accurate result. Every Battery offers professional in-store battery testing to assess performance and remaining capacity.
The lifespan of a deep cycle battery depends on the battery type and how it’s used. AGM deep cycle batteries typically last between three and five years, while lithium deep cycle batteries can last significantly longer. Proper charging and avoiding excessive over-discharge will help extend battery life.
A deep cycle battery should be charged using a charger designed for its specific battery type, such as AGM or lithium. Charging can be done via mains power, solar panels or a vehicle alternator. Using the correct charger settings helps maximise battery life and performance.
