Deep Cycle AGM Batteries

A Fullriver leisure battery is basically a higher‑quality version of a regular leisure battery.The main differences are:

• Build quality: Fullriver batteries use very pure lead (99.994%) and stronger internal construction, which helps them last longer and handle vibration better.
• Longer life: They are designed for many more charge and discharge cycles than typical leisure batteries, with the EGL series boasting a lifespan four times longer than a regular leisure battery.
• More reliable performance: They’re built for demanding uses like boats, campervans, solar systems, and even emergency vehicles. 
• Better value over time: The intial outlay of a Fullriver leisure battery may be slightly more upfront, but their longer lifespan often makes them cheaper in the long run.

So in simple terms: a Fullriver leisure battery is a more durable, longer‑lasting leisure battery made with better materials and construction.

The term 'leisure battery' is now widely used to describe any deep cycle battery used to power equipment in campervans, motorhomes, caravans and boats, such as lighting, fridges, water pumps and charging points. Unlike a starting battery, it's designed to supply steady power over long periods and be recharged again and again.

It depends on how much power you use, the space you have available, and how long you want to go between charges. Add up the power draw of everything you'll run and how many hours each day you'll use it, then size your leisure battery so you're only using around half its rated capacity on a typical day. Talk to our team to help you work out the right size for your setup.

Fully charge your leisure battery before storing it, disconnect it from any loads, and keep it somewhere cool and dry. Top it up periodically or use a suitable maintenance charger to stop it slowly discharging over the winter months. AGM batteries, like those made by Fullriver, have extremely low self-discharge, so they hold their charge well during storage.

A good-quality AGM leisure battery can last many years, with the flagship DC-series range from Fullriver designed for a 10-year lifespan. However, how long your leisure battery lasts also depends on how deeply it's discharged, how it's charged and the temperatures it's used in. Keeping regular discharges shallow (above 50%), charging with the correct profile and avoiding leaving it flat will make the biggest difference.

We stock 4 battery ranges from Fullriver. We have the DC Series, EGL, and Full Force Range of batteries as our deep cycle options. Our Full Throttle battery range is our extreme starter battery option.

Our DC range is our flagship deep-cycle battery, perfect for applications where reliability is critical: blue light, ambulance, fire & rescue, super yachts.

The Full Force battery range is the most affordable deep-cycle battery from Fullriver. Full Force batteries are built to the same high standard you'd expect from Full River, but just designed for those less demanding applications than the DC range: solar, campervans, and access platform lifts. This battery is extremely popular with leisure users who still want the reliability and performance you’d associate with the Fullriver brand.

The EGL series battery is the best deep-cycle battery on the market today. Safe, environmentally sustainable, zero-maintenance batteries with 4 times the life of cycle life of a conventional AGM battery. These batteries are purpose-built for electric vehicles facing high demands and repeated daily cycling; the EGL is changing the game.

The Full Throttle battery range is our starting/cranking battery option. These are perfect batteries for starting anything from a motorbike, HGV, to winches, motors, pumps, or compressors.

We also have a quick 2-minute video talking you through how to make a decision about which battery is right for you.

Alternatively, you can also make use of Fullriver’s very own ‘Battery Finder’ by clicking here.

Our DC range is our flagship deep-cycle battery, perfect for applications where reliability is critical: blue light, ambulance, fire & rescue, super yachts.

The Full Force battery range is the most affordable deep-cycle battery from Fullriver. Full Force batteries are built to the same high standard you'd expect from Full River, but just designed for those less demanding applications than the DC range: solar, campervans, and access platform lifts. This battery is extremely popular with leisure users who still want the reliability and performance you’d associate with the Fullriver brand

The EGL series battery is the best deep-cycle battery on the market today. Safe, environmentally sustainable, zero-maintenance batteries with 4 times the life of cycle life of a conventional AGM battery. These batteries are purpose-built for electric vehicles facing high demands and repeated daily cycling; the EGL is changing the game.

Fullriver's deep cycle range of batteries (DC Series, EGL Series, and Full Force series batteries) are generally supplied with M8 terminals.

There are exceptions in all ranges. All terminal types are displayed in product datasheets and descriptions.

DC Series

• Flagship deep-cycle battery built for the most demanding applications
• Thicker pure lead plates for maximum life cycles and greater reserve capacity
• Provide +1200 cycles to a 50% depth of discharge
• Backed by a full 5-year warranty
• Perfect for critical applications: blue light vehicles, ambulances, fire & rescue, super yachts
• Premium construction and craftsmanship for longest life

Full Force

• Most affordable deep-cycle option from Fullriver
• Built to the same high standard, but designed for less demanding applications
• Provide ~900 cycles to a 50% depth of discharge
• Come with a standard 2-year warranty
• Ideal for leisure applications, solar systems, campervans, traffic management applications and access platform lifts

In short: The DC Series offers maximum performance and longevity for professional or critical applications, while the Full Force provides reliable Fullriver quality at a more affordable price for leisure and less demanding uses.

Many fleets, emergency services and specialist vehicle builders have systems designed and validated around lead-acid batteries. AGM batteries slot straight into those systems with no changes to charging, wiring or control equipment, and no requalification work. Fullriver AGM batteries are already used in police and ambulance fleets, where reliable fleet batteries are essential for powering critical auxiliary equipment.

It depends on the application. Lithium is often the better choice where weight, usable capacity, fast charging and heavy daily cycling matter most. AGM remains the more sensible choice where simplicity, cold-weather performance, compatibility with existing systems and proven reliability matter more. Our team can help you choose the right chemistry for your application, whether that's AGM or lithium.

In most cases, yes. An AGM battery can usually replace an existing lead-acid battery without changes to your alternator, charger, DC-DC charger or wiring, as long as your charging equipment has an AGM charge profile. Switching to lithium can mean upgrading parts of your wider electrical system, so AGM is often the simpler like-for-like choice.

Yes. AGM batteries can be charged and used in sub-zero temperatures, whereas most lithium batteries can't be charged below freezing without built-in heating or low-temperature protection. That makes AGM a dependable choice for vehicles, vessels and remote installations exposed to cold conditions.

Lifespan depends mainly on how deeply and how often the battery is discharged, along with charging and operating temperature. Avoiding deep discharges and using the correct charge profile will significantly extend service life. Our team can help you size a system to get the most from your batteries. Our flagship DC Series batteries from Fullriver are designed for a 10-year lifespan.

AGM deep cycle batteries can handle deep discharges, but keeping regular use to around 50% of rated capacity will give you far more cycles over the battery's life. Sizing your battery bank with this in mind is one of the simplest ways to get the best value from it.

Fullriver AGM batteries can be mounted in multiple orientations thanks to their sealed design, giving more flexibility in tight vehicle or vessel installations. Check the datasheet for your specific model before installing.