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Marine Batteries

Marine batteries are specifically designed to provide reliable and long-lasting power for boats and other marine applications. They are built to withstand the harsh marine environment and deliver high levels of performance, often featuring deep cycle capabilities, high cold cranking amps, and high reserve capacities. With a variety of options available, including maintenance-free and sealed designs, marine batteries are an excellent choice for powering your boating activities and other marine applications. Shop our range of marine batteries.

Marine batteries are specifically designed to provide reliable and long-lasting power for boats and other marine applications. They are built to withstand the harsh marine environment and... read more »
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Marine Batteries

Marine batteries are specifically designed to provide reliable and long-lasting power for boats and other marine applications. They are built to withstand the harsh marine environment and deliver high levels of performance, often featuring deep cycle capabilities, high cold cranking amps, and high reserve capacities. With a variety of options available, including maintenance-free and sealed designs, marine batteries are an excellent choice for powering your boating activities and other marine applications. Shop our range of marine batteries.

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1 from 35
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Varta Silver Dynamic A7 (E39) xEV AGM 12v 70Ah 760CCA Type 096 Car Battery
Varta Silver Dynamic A7 (E39) xEV AGM 12v 70Ah...
  • Brand: Varta
  • UK Part Code: 096
  • Voltage: 12
  • Capacity AH (C20): 70
  • CCA: 760
  • Size (L x W x H): 278 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£137.79

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Bosch car battery S5A11 start-stop 12V 80Ah 800A Type 115
12V 80Ah Engine Starter Battery Bosch S5A11 AGM
  • Brand: Bosch
  • UK Part Code: 115
  • Voltage: 12
  • Capacity AH (C20): 80
  • CCA: 800
  • Size (L x W x H): 315 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£148.82

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12V 70Ah 760A AGM Engine Starter Battery X-PRO AGM70 Stop-Start
12V 70Ah 760A AGM Engine Starter Battery X-PRO...
  • Brand: X-PRO
  • UK Part Code: 096
  • Voltage: 12
  • Capacity AH (C20): 70
  • CCA: 760
  • Size (L x W x H): 278 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£99.99 RRP £120.82

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Exide EK800 Start-Stop AGM 80Ah 800A Type 110 12V Car Battery
12V 80Ah Engine Starter Battery Exide EK800 AGM
  • Brand: Exide
  • UK Part Code: 115
  • Voltage: 12
  • Capacity AH (C20): 80
  • CCA: 800
  • Size (L x W x H): 315 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£117.61

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Bosch car battery S5A08 start-stop 12V 70Ah 760A
12V 70Ah Engine Starter Battery Bosch S5A08 AGM
  • Brand: Bosch
  • UK Part Code: 096
  • Voltage: 12
  • Capacity AH (C20): 70
  • CCA: 760
  • Size (L x W x H): 278 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£128.07

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Platinum SD690L 90Ah 12V Leisure Plus Battery
12V 90Ah Dual Purpose Domestic Leisure Battery...
  • Brand: Platinum
  • Voltage: 12
  • Capacity AH (C20): 90
  • Size (L x W x H): 302 x 170 x 222
  • Start-Stop: No
  • Technology: Standard Wet Battery
£86.62 RRP £89.99

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12V 95Ah Engine Starter Battery Exide EK950 AGM
12V 95Ah Engine Starter Battery Exide EK950 AGM
  • Brand: Exide
  • UK Part Code: 019
  • Voltage: 12
  • Capacity AH (C20): 95
  • CCA: 850
  • Size (L x W x H): 353 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£150.67

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Exide EK700 Start-Stop AGM 12V 70Ah 760A car battery
12V 70Ah Engine Starter Battery Exide EK700 AGM
  • Brand: Exide
  • UK Part Code: 096
  • Voltage: 12
  • Capacity AH (C20): 70
  • CCA: 760
  • Size (L x W x H): 278 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£112.91

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Varta Silver Dynamic A8 (D52) xEV AGM 12V 60Ah 680CCA Type 027 Car Battery
Varta Silver Dynamic A8 (D52) xEV AGM 12V 60Ah...
  • Brand: Varta
  • UK Part Code: 027
  • Voltage: 12
  • Capacity AH (C20): 60
  • CCA: 680
  • Size (L x W x H): 242 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£120.13

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X-Pro 57219 12V 72ah 610CCA Starter battery
12V 72Ah Engine Starter Battery X-Pro 57219
  • Brand: X-PRO
  • UK Part Code: 096R
  • Voltage: 12
  • Capacity AH (C20): 72
  • CCA: 610
  • Size (L x W x H): 276 x 173 x 190
  • Start-Stop: No
  • Technology: Standard Wet Battery
£58.04

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12V 95Ah Engine Starter Battery Bosch S5A13 AGM
12V 95Ah Engine Starter Battery Bosch S5A13 AGM
  • Brand: Bosch
  • UK Part Code: 019
  • Voltage: 12
  • Capacity AH (C20): 95
  • CCA: 850
  • Size (L x W x H): 353 x 175 x 190
  • Start-Stop: Yes
  • Technology: AGM
£167.58

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Numax XV31MF 12v 105ah (C20hr) SMF Deep Cycle Leisure Battery
Numax XV31MF 12v 105ah (C20hr) SMF Deep Cycle...
  • Brand: Numax
  • Voltage: 12
  • Capacity AH (C20): 105
  • Size (L x W x H): 330 x 172 x 242
  • Start-Stop: No
  • Technology: Standard Wet Battery
£76.65

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1 from 35

Marine batteries

Whether you’re primarily interested in marine batteries to start your boat’s motor or run a modern suite of comfort electronics while aboard, a good boating experience demands a top-quality marine battery. As you’ll be replacing even the best quality boat battery every 4-6 years, you’ll need to know exactly what to buy when the time comes.

Do I need a ‘starter’, ‘dual purpose’ or ‘leisure’ marine battery?

Starter boat batteries are primarily designed to start your engine, and to be recharged slowly as the engine runs. They deliver a great deal of power quickly, but might be less efficient at running low-power electronics and appliances. By contrast, a leisure or deep cycle marine battery is m ore efficient at delivering a smaller charge over a longer period.

Many larger boats and leisure craft use a back of different batteries, and can accept both a crank and a deep cycle marine battery at the same time. A dual purpose boat battery is designed to do both jobs reasonably well, but works in a smaller boat which only uses a single battery at a time.

What is the difference between Lithium Iron Phosphate, AGM, Gel and Flooded boat batteries??

Lithium Iron Phosphate marine batteries are a very new technology. They can be a bit pricy compared to other types, but offer a very long live, often between 2500 and 4000 cycles. They can be safely discharged up to around 90% (compared to 80% at best for most other technologies). They also tend to be smaller and lighter than other types of batteries at the same performance level.

In the end, even with the higher purchase price, Lithium iron phosphate marine batteries generally offer a lower cost per cycle, as they will outlast the other types by a wide margin.

 

Absorbed Gas Mat (AGM) boat batteries separate the battery’s positive and negative electrical plates with a glass matt saturated with an electrolyte solution. They are low maintenance, resist shock very well compared to other marine battery types. They tend to offer both greater starting power and faster charging than other types as well.

AGM batteries often find use as dual-purpose marine batteries because of their excellent all-around performance.

 

Gel marine batteries rely on a thick, largely leak-proof gel of acids, water and silica. They are therefore much lower maintenance than a flooded type battery, and are especially useful if the battery ever has to be inverted or laid on its side for extended periods. However, you must be careful to charge AGM batteries at a lower voltage than other marine battery types.

Gel batteries can excel at either the crank or deep cycle boat battery roles, depending on how they are constructed.

 

Flooded boat batteries are one of the oldest types of battery technology used on boats and leisure craft today, but they are still one of the most common due to their low cost and simple construction. They are called ‘flooded’ because they lay a series of lead plates in a bath of sulphuric acid to produce power. Recharging the batteries produces both oxygen and hydrogen by breaking down the water that dilutes the acid, so many require periodic top-ups with distilled water. They also self-discharge at a higher rate than other types, so they must be charged after moderate periods of disuse. They must also be used in a completely upright position, which can be difficult to manage aboard a boat.

Flooded boat batteries make excellent crank batteries and reasonably good all-arounders. They also handle overcharging better than any other battery type.

 

We offer a wide range of marine batteries, including both starter batteries and ‘leisure’ or ‘supply’ batteries. Please take a look, and feel free to filter our selection by price, brand, capacity or a range of other qualifiers.

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