# Marine battery Fullriver DC120-12B 12V 120Ah 760A AGM ![Marine battery Fullriver DC120-12B 12V 120Ah 760A AGM](https://baterias.com/67-home_default/battery-agm-fullriver-dc120-12b-12v-120ah.jpg) > Fullriver DC120-12B marine battery 12V 120Ah 760A AGM. DC Series range. Dimensions 331×175×218 mm. Cranking and house duties. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [FULLRIVER](https://baterias.com/gb/fullriver) - **Canonical URL**: https://baterias.com/gb/battery-agm-fullriver-dc120-12b-12v-120ah - **Language**: en-GB - **Brand**: FULLRIVER - **Reference**: BCOM-FULLRIVER-DC120-12B - **MPN**: DC120-12B - **Price**: 422,20 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULLRIVER | | Reference | DC120-12 B | | Model | FULLRIVER DC | | Voltage (V) | 12 V | | Largo | 331 mm | | Ancho | 175 mm | | Alto | 218 mm | | Peso | 36.5 kg | | Tecnología | AGM | | Terminal type | M8 | | Cold cranking amps (EN) | 760 | | Capacity (C20) | 120 Ah (c20) | | Capacity (C5) | 98 Ah (c5) | ## Quick description **Fullriver DC120-12B 12V 120Ah 760A** 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 design** built for boat swell and vibration - **Dual function** starts the engine and powers onboard services - **Sealed and safe** maintenance-free even when the boat rolls 🔌 Voltage 12 V ⚡ Capacity 120 Ah C20 🔋 Cold cranking 760 A EN-1 📏 Dimensions 331×175×218 mm ⚙️ Technology AGM ⚖️ Weight 36,5 kg 🏷️ Model DC Series ## Description ## Marine battery Fullriver DC120-12B DC 120Ah 760A 12V 12*V* Voltage 120*Ah* Capacity 760*A* Cold cranking 36.50*kg* Weight With **120 Ah** at **12 V** and **760 A** of cold cranking current (EN), the **Fullriver DC120-12B** from the **DC** range is built for motor and sailing boats, both for engine starting and onboard services. Measuring 331 × 175 × 218 mm, it is the direct replacement for boats fitted from the factory with a 120 Ah battery of this format. - 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 DC120-12B is for On board, the Fullriver DC120-12B provides 120 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 36.50 kg and M8 terminals. ### Will it fit your current battery tray? In terms of format, the Fullriver DC120-12B measures 331 × 175 × 218 mm (length × width × height) and weighs 36.50 kg. It uses M8 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. ### The Fullriver DC120-12B: DC range and AGM technology The DC120-12B is part of the Fullriver **DC** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. 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. ### 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 DC120-12B comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered. ### How to make it last longer As a service battery, avoid routine discharges below 50% to extend its cycle life. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### When you get it and how to return it Order **before 6:00 pm** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **14 days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### Is the Fullriver DC120-12B an AGM battery and what are the benefits of AGM? Yes. The DC120-12B from Fullriver uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for boats with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### 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 DC120-12B battery? Dimensions (length × width × height) are 331×175×218 mm — also written as 331x175x218 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-30*