Fullriver FT620-51 · Marine battery 12V 55Ah 620A AGM

Marine battery Fullriver FT620-51 Full Throttle Series 55Ah 620A 12V

With 55 Ah at 12 V and 620 A of cold cranking current (EN), the Fullriver FT620-51 from the Full Throttle Series range is built for motor and sailing boats, both for engine starting and onboard services. It replaces the original battery without adaptation in boats with a 229 × 138 × 230 mm format: same 55 Ah capacity.

• AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
• Reinforced case against vibration and swell.
• Powers onboard services: lights, sounder, GPS, fridge.
• Tolerates the daily cycling of a boat in season.

What the Fullriver FT620-51 is for

The Fullriver FT620-51 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 18 kg and M8 + TP28 (SAE) terminals.

Size, terminals and hold-down of the Fullriver FT620-51

In terms of format, the Fullriver FT620-51 measures 229 × 138 × 230 mm (length × width × height) and weighs 18 kg. It uses M8 + TP28 (SAE) terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.

The Fullriver FT620-51: Full Throttle Series range and AGM technology

Within the Fullriver catalogue, the Full Throttle Series series groups the references designed for this use. The FT620-51 is the 55 Ah model of that family, with the same performance as its siblings in other sizes.

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.

How to make it last longer

At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. As a service battery, avoid routine discharges below 50% to extend its cycle life.

Manufacturer's warranty

The Fullriver FT620-51 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

Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.