Fullriver DC40-12 · Marine battery 12V 40Ah 275A AGM

Marine battery Fullriver DC40-12 DC 40Ah 275A 12V

The Fullriver DC40-12 marine battery offers 12 V, 40 Ah and 275 A of cold cranking current (EN) from the DC range with AGM technology, designed for motor and sailing boats, both for engine starting and onboard services. Measuring 198 × 166 × 174 mm, it is the direct replacement for boats fitted from the factory with a 40 Ah battery of this format.

In short: the Fullriver DC40-12 (40 Ah, 275 A, 198 × 166 × 174 mm). Verified equivalent alternatives: Fullriver DC38-12 and Fullriver DC50-12B.

• Sealed: no spills or gases in the locker.
• Resistant to humidity and salt air.
• AGM: faster recharging and better cycle resistance than a conventional battery.
• Ready for starting outboard and inboard engines.

What the Fullriver DC40-12 is for

The Fullriver DC40-12 is designed for motor and sailing boats, both for engine starting and onboard services. If it is your starter battery, run the services from a separate battery; if it is a service battery, avoid routinely discharging it beyond 50%. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 13.40 kg and M6 terminals.

The Fullriver DC40-12: DC range and AGM technology

The DC is the Fullriver range the DC40-12 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.

In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.

Dimensions, polarity and mounting

It has external dimensions of 198 × 166 × 174 mm and weighs 13.40 kg. It uses M6 terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

What Fullriver does differently

With its own plants and a catalogue focused on high-performance AGM, Fullriver is a familiar brand in power wheelchairs, boats and photovoltaic systems that need thousands of cycles. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

How to make it last longer

As a service battery, avoid routine discharges below 50% to extend its cycle life. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.

Official warranty

The Fullriver DC40-12 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

When you get it and how to return it

Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.