# Marine battery Fullriver DCG100-12 12V 100Ah AGM ![Marine battery Fullriver DCG100-12 12V 100Ah AGM](https://baterias.com/116-home_default/battery-fullriver-dcg100-12-12v-100ah.jpg) > Fullriver DCG100-12 marine battery 12V 100Ah AGM. DCG Series range. Dimensions 329×171×227 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-fullriver-dcg100-12-12v-100ah - **Language**: en-GB - **Brand**: FULLRIVER - **Reference**: BCOM-FULLRIVER-DCG100-12 - **MPN**: DCG100-12 - **Price**: 405,90 € (VAT incl., Spain) - **Last updated**: 2026-08-30 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULLRIVER | | Reference | DCG100-12 | | Model | FULLRIVER DCG | | Voltage (V) | 12 V | | Largo | 329 mm | | Ancho | 171 mm | | Alto | 227 mm | | Peso | 31.7 kg | | Tecnología | AGM | | Terminal type | AP | | Capacity (C20) | 100 Ah (c20) | | Capacity (C5) | 84 Ah (c5) | ## Quick description **Fullriver DCG100-12 12V 100Ah** 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 100 Ah C20 📏 Dimensions 329×171×227 mm ⚙️ Technology AGM ⚖️ Weight 31,7 kg 🏷️ Model DCG Series ## Description ## Marine battery Fullriver DCG100-12 DCG 100Ah 12V 12*V* Voltage 100*Ah* Capacity 31.70*kg* Weight The **Fullriver DCG100-12 marine battery** offers **12 V**, **100 Ah** from the **DCG** range with AGM technology, designed for motor and sailing boats, both for engine starting and onboard services. Its 329 × 171 × 227 mm make it the exact replacement for the 100 Ah battery fitted as standard to many boats. - Ready for starting outboard and inboard engines. - AGM: faster recharging and better cycle resistance than a conventional battery. - Resistant to humidity and salt air. - Sealed: no spills or gases in the locker. ### What the Fullriver DCG100-12 is for On board, the Fullriver DCG100-12 provides 100 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 31.70 kg and AP terminals. ### Dimensions, polarity and mounting The Fullriver DCG100-12 is made in the 329 × 171 × 227 mm format and weighs 31.70 kg. It uses AP 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. ### The Fullriver DCG100-12: DCG range and AGM technology Within the Fullriver catalogue, the **DCG** series groups the references designed for this use. The DCG100-12 is the 100 Ah model of that family, with the same performance as its siblings in other sizes. AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly. ### Why choose Fullriver batteries 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. We guarantee that every Fullriver arrives new, charged and with the manufacturer's full warranty. ### Manufacturer's warranty The Fullriver DCG100-12 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 Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. 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. ## Frequently asked questions ### Is the Fullriver DCG100-12 an AGM battery and what are the benefits of AGM? Yes: the DCG100-12 from Fullriver uses AGM (Absorbent Glass Mat) technology, a sealed lead-acid battery whose electrolyte soaks a glass-fibre mat. It withstands more cycles than a conventional battery and copes better with heat. ### Is this a starting or a service (leisure) battery? Service: it is designed to power electronics, lights, the fridge or the windlass for hours, withstanding deep discharges. On boats with two circuits the ideal is one starting battery and one service battery. ### 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 DCG100-12 battery? Before buying, measure the space in your boat: one extra millimetre can stop the hold-down clamp from closing. The Fullriver DCG100-12 takes up 329×171×227 mm (length, width and height, terminals included). ## 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 · 2026-11-10*