# Marine battery Fullriver DC85-12 12V 85Ah 510A AGM ![Marine battery Fullriver DC85-12 12V 85Ah 510A AGM](https://baterias.com/114-home_default/battery-agm-fullriver-dc85-12-12v-85ah.jpg) > Fullriver DC85-12 marine battery 12V 85Ah 510A AGM. DC Series range. Dimensions 260×169×236 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-dc85-12-12v-85ah - **Language**: en-GB - **Brand**: FULLRIVER - **Reference**: BCOM-FULLRIVER-DC85-12 - **MPN**: DC85-12 - **Price**: 328,60 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULLRIVER | | Reference | DC85-12 | | Model | FULLRIVER DC | | Voltage (V) | 12 V | | Largo | 260 mm | | Ancho | 169 mm | | Alto | 215 mm | | Peso | 25.1 kg | | Tecnología | AGM | | Terminal type | M6 | | Cold cranking amps (EN) | 510 | | Capacity (C20) | 85 Ah (c20) | | Capacity (C5) | 70 Ah (c5) | ## Quick description **Fullriver DC85-12 12V 85Ah 510A** is a marine battery, vibration- and deep-discharge resistant, suitable both for outboard engine starting and for onboard auxiliary services (navigation lights, GPS, sonar, fridge). Sealed and maintenance-free. ## 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 85 Ah C20 🔋 Cold cranking 510 A EN-1 📏 Dimensions 260×169×236 mm ⚙️ Technology AGM ⚖️ Weight 25,1 kg 🏷️ Model DC Series ## Description ## Marine battery Fullriver DC85-12 DC 85Ah 510A 12V 12*V* Voltage 85*Ah* Capacity 510*A* Cold cranking 25.10*kg* Weight The **Fullriver DC85-12 marine battery** offers **12 V**, **85 Ah** and **510 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. It replaces the original battery without adaptation in boats with a 260 × 169 × 215 mm format: same 85 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 DC85-12 is for With 85 Ah, the Fullriver DC85-12 covers motor and sailing boats, both for engine starting and onboard services. At the end of the season, charge it fully before winter storage. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 25.10 kg and M6 terminals. ### Dimensions, polarity and mounting The Fullriver DC85-12 is made in the 260 × 169 × 215 mm format and weighs 25.10 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. ### The Fullriver DC85-12: DC range and AGM technology Within the Fullriver catalogue, the **DC** series groups the references designed for this use. The DC85-12 is the 85 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. ### Fullriver: the maker behind the DC85-12 Fullriver specialises in deep-cycle AGM batteries for mobility, marine, solar and traction. Its DC and HC series are known for their tolerance to deep discharge and long cycle life. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Official warranty The Fullriver DC85-12 comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered. ### Care and maintenance Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. ### 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 DC85-12 model AGM? What does this technology offer? Yes. The DC85-12 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 DC85-12 battery? Dimensions (length × width × height) are 260×169×236 mm — also written as 260x169x236 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 · 2026-10-29*