What is a deep-cycle battery?

A deep-cycle battery is designed to be discharged to 80% of its capacity and recharged repeatedly without losing lifespan. Unlike starter (SLI) batteries, it does not deliver high current peaks but sustains a constant load over hours — ideal for fridges, lights and electric trolling motors in boats or caravans.

When do I need a deep-cycle battery?

Whenever you power equipment for long periods: caravan fridge, electric outboard, solar panels, mobility scooter, golf cart, medical life support. A standard car battery will NOT survive this regime — it would degrade within weeks.

How long does a deep-cycle battery last?

Between 4 and 12 years depending on technology (AGM deep-cycle: 5-8; GEL: 6-10; LiFePO4: 10-15). The biggest factor is depth of discharge (DoD): at 50% DoD they last twice as many cycles as at 80% DoD. A smart charger with deep-cycle mode is mandatory.

Can I use a deep-cycle battery for engine starting?

Not recommended as your only starter battery: deep-cycle batteries deliver less cranking amps (CCA) than an SLI or starter AGM. The correct setup is two batteries in parallel: a starter (SLI/AGM) and a service (deep-cycle), separated by a relay or BMS. Some "dual purpose" hybrid batteries cover both uses with intermediate performance.

Do deep-cycle batteries need maintenance?

Modern AGM and GEL deep-cycle batteries are sealed and maintenance-free. Open lead-acid batteries (flooded deep-cycle, like Trojan) do require periodic distilled water top-ups every 1-3 months depending on use. LiFePO4 require absolutely no maintenance.

This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analysing your browsing habits. To consent to their use, click the “I accept” button.

More information about cookies

Functional cookies

Yes

Description and cookies

Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.

Cookie	Provider	Purpose	Expiry
PHP_SESSID	baterias.com	The PHPSESSID cookie is native to PHP and allows websites to store serialised status data. On the website it is used to establish a user session and to pass state data through a temporary cookie, which is commonly known as a session cookie. These Cookies will only remain on your computer until you close your browser.	Session
PrestaShop-#	baterias.com	This is a cookie used by Prestashop to store information and keep the user's session open. It stores information such as currency, language, customer ID, among other data necessary for the proper functioning of the shop.	480 hours

Advertising Cookies

Yes

Description

These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.

Analytics cookies

Yes

Description and cookies

Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.

Cookie	Provider	Purpose	Expiry
ANONCHK	Microsoft (Clarity)	Auxiliary Microsoft cookies used to synchronise the identifier across its domains.	10 minutes
CLID	Microsoft (Clarity)	Identify the browser’s first visit to the website in Clarity.	1 year
MR	Microsoft (Clarity)	Auxiliary Microsoft cookies used to synchronise the identifier across its domains.	7 days
MUID	Microsoft (Clarity)	Identify unique browsers across Microsoft services.	1 year
SM	Microsoft (Clarity)	Auxiliary Microsoft cookies used to synchronise the identifier across its domains.	Session
_clck	Microsoft (Clarity)	Store Clarity’s pseudonymous identifier to recognise visits from the same browser.	1 year
_clsk	Microsoft (Clarity)	Group the pages viewed into the same Clarity session.	1 day

Performance cookies

Yes

Description

These are used to improve the browsing experience and optimize the operation of the shop.

Other cookies

Yes

Description

These are cookies without a clear purpose or those that we are still in the process of classifying.

12,383 customer reviewsThank you for trusting us!Thank you! Excellent 4.5 out of 5

Deep-cycle batteries

Deep-cycle batteries are designed for applications that demand sustained discharge: golf carts, industrial scrubbers, mobility scooters and solar systems.

Extreme cyclic capacity: hundreds of cycles at high depth of discharge.
Thick plates built for slow, sustained discharge — not for cranking.
Do not mix with starter batteries: using a starter in a cyclic application will destroy it within months.

See all AGM batteries → · See all GEL batteries →

Compatible batteries

Receive them tomorrow before 5 PM if you order before 6 PM (Spain mainland and Portugal only).

Before you buy: check 3 key points

Although the batteries shown are sourced from information provided by manufacturers, we recommend checking on your current battery:

Dimensions (length × width × height, including terminals and protrusions)
The dimensions shown are the maximum of the battery and include the height of the terminals, small ridges at the base and any lateral protrusions. Measure your current battery completely, from edge to edge. The new one must be the same size or slightly smaller — never larger, it would not fit in the housing.
Positive terminal (left or right viewed from the front — check the battery photo carefully)
Stand facing the battery, with the manufacturer's label facing you and the terminals on top. Locate the terminal marked with +: if it is on your right, it is "positive right"; if it is on your left, it is "positive left". Do not rely on how the battery is mounted in the car — the position is always measured looking only at the battery itself.
Technology (AGM, EFB or conventional — the same as your current battery or higher)
Depending on the manufacturer, the same technology may be labelled differently: AGM may also appear as VRLA, AGM Start-Stop or AGM Deep Cycle. EFB may appear as EF, EFB+ or Enhanced Flooded Battery. Conventional may appear as SLI, Lead-Acid, Wet or Standard. If your vehicle has Start-Stop, the battery must be AGM or EFB — never conventional.

If you have any questions, just ask us and we'll be glad to advise you with no obligation.

This engine comes with an AGM/EFB battery as standard: the car's charging system requires it even without Start-Stop. If in doubt, message us and we will confirm.

Page 10 of 29 — products 181-200 of 569

Deep-cycle batteries

Compatible batteries

Marine battery Varta LA80 Deep Cycle AGM 12V 77Ah AGM

Wheelchair battery Long LGK75-12N 12V 75Ah GEL

Traction battery Q-battery 12GEL-70 12V 70Ah GEL

Telecom battery Ritar FT12-100A 12V 100Ah AGM

Telecom battery Ritar FT12-110 12V 110Ah AGM

Marine battery Fullriver FT100 12V 8Ah 100A AGM

Marine battery Fullriver FT185 12V 14Ah 185A AGM

Telecom battery Ritar FT12-105 12V 105Ah AGM

Telecom battery Ritar FT12-100S 12V 100Ah AGM

Traction battery Q-battery 6GEL-180 6V 180Ah GEL

Traction battery Q-battery 6GEL-240 6V 240Ah GEL

Traction battery Q-battery 6GEL-270 6V 270Ah GEL

Traction battery Q-battery 12GEL-51 12V 51Ah GEL

Traction battery Q-battery 12GEL-65 12V 65Ah GEL

Traction battery Q-battery 12GEL-105 12V 105Ah GEL

Marine battery Fullriver FT1210 12V 140Ah 1210A AGM

Marine battery Fullriver FT200L 12V 14Ah 200A AGM

Marine battery Fullriver FT100R 12V 8Ah 100A AGM