Fullriver FFD55-12 Full Force Series · Battery 55Ah 350A AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | FFD55-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 55 |
| Capacity (C5) | 44 Ah (c5) |
| Cold cranking amps (EN) | 350 |
| Technology | AGM |
| Length | 229 mm |
| Width | 138 mm |
Fullriver FFD55-12 12V 55Ah 350A is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea.
Why this marine battery?
- Marine designbuilt for boat swell and vibration
- Dual functionstarts the engine and powers onboard services
- Sealed and safemaintenance-free even when the boat rolls
Where it fits: the Fullriver FFD55-12 is one of our boat batteries, belongs to our Fullriver batteries and by capacity it sits among our 55Ah batteries.

Marine battery Fullriver FFD55-12 Full Force Series 55Ah 350A 12V
The Fullriver FFD55-12 with AGM technology is a marine battery with 55 Ah and 350 A of cold cranking current (EN) 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 × 212 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 FFD55-12 is for
On board, the Fullriver FFD55-12 provides 55 Ah with a case reinforced against vibration and swell. Keep the terminals clean and protected from salt humidity. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 16.40 kg and M6 terminals.
Dimensions, polarity and mounting
The Fullriver FFD55-12 is made in the 229 × 138 × 212 mm format and weighs 16.40 kg. It uses M6 terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.
The Fullriver FFD55-12: Full Force Series range and AGM technology
The FFD55-12 is part of the Fullriver Full Force Series range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid 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.
Manufacturer's warranty
The Fullriver FFD55-12 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Care and maintenance
At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.
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.
Data sheet
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BrandFULLRIVER
-
ReferenceFFD55-12
-
ModelFull Force Series
-
Voltage (V)12
-
Length229 mm
-
Width138 mm
-
Height212 mm
-
Weight16.40 Kgs
-
TechnologyAGM
-
EAN131847
-
Terminal typeM6
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Cold cranking amps (EN)350
-
Capacity (C20)55
-
Case type22NF
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Capacity (C5)44 Ah (c5)
Specific References
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MPNFFD55-12
Fullriver FFD55-12: best-selling equivalent or higher-spec batteries
The Fullriver FFD55-12 is interchangeable with these equivalent references: DC55-12 (Fullriver).
| Product | Specifications | Technology | Price | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Fullriver
FFD55-12
This battery
|
12V 55Ah 350A | AGM | 337,90 € | |||||||||||||||||||||
Fullriver
DC55-12
Bigger sister |
12V 55Ah 400A | AGM | 207,90 € −130,00 € | |||||||||||||||||||||
| ||||||||||||||||||||||||
| FFD55-12 | DC55-12 | |
|---|---|---|
| Capacity | 55 Ah | 55 Ah |
| Cold cranking (EN) | 350 A | 400 A |
| Technology | AGM | AGM |
| Dimensions (mm) | 229 × 138 × 212 | 229 × 138 × 212 |
| Positive terminal | — | — |
| Price | 337,90 € | 207,90 € |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Other 55Ah batteries: We stock 26 models of 55 Ah to compare by price, technology and cold cranking: see all 55Ah batteries. Same size (229 × 138 × 212 mm): batteries of 229 × 138 × 212 mm.
Recommended accessories
Frequently asked questions
Is the Fullriver FFD55-12 an AGM battery and what are the benefits of AGM?
Yes. AGM (Absorbent Glass Mat) technology, 55 Ah and 12 V: sealed lead-acid, with the electrolyte held in glass fibre. Its advantages: more charge/discharge cycles than a conventional battery and better heat tolerance.
In what position can it be installed on the boat?
Being AGM, it is sealed and does not spill: it can be mounted tilted (never upside down) and copes well with vibration and wave impacts. Secure it firmly and keep the terminals away from water.
What are the dimensions of the Fullriver FFD55-12 battery?
Measure your boat's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. Length × width × height: 229x138x212 mm. Height is measured to the top of the terminals.
Fullriver FFD55-12 or Fullriver DC55-12: which one to choose?
It is the bigger sister of the FFD55-12 in the same Fullriver range. Compared with the FFD55-12 it has 50 A of cold cranking more. It costs 130,00 € less. More capacity means more runtime: worth it if your equipment takes the size and had that capacity or more; otherwise the FFD55-12 does the job.
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