# Marine battery Fullriver DCG40-12 12V 40Ah AGM ![Marine battery Fullriver DCG40-12 12V 40Ah AGM](https://baterias.com/133-home_default/battery-fullriver-dcg40-12-12v-40ah.jpg) > Fullriver DCG40-12 marine battery 12V 40Ah AGM. Vibration resistant, deep-discharge capable; cranking and house duties. 24 h delivery. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [FULLRIVER](https://baterias.com/gb/fullriver) - **Canonical URL**: https://baterias.com/gb/battery-fullriver-dcg40-12-12v-40ah - **Language**: en-GB - **Brand**: FULLRIVER - **Reference**: BCOM-FULLRIVER-DCG40-12 - **MPN**: DCG40-12 - **Price**: 175,29 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULLRIVER | | Reference | DCG40-12 | | Model | FULLRIVER DCG | | Voltaje | 12 V | | Largo | 198 mm | | Ancho | 166 mm | | Alto | 171 mm | | Peso | 13.5 kg | | Tecnología | AGM | | Terminal | M6 | | Capacidad C20 (Ah) | 40 Ah (c20) | | Capacidad C5 (Ah) | 33 Ah (c5) | ## Quick description **Fullriver DCG40-12 12V 40Ah** 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 i 12 V ⚡ Capacity i 40 Ah C20 📏 Dimensions i 198×166×171 mm ⚙️ Technology i AGM ⚖️ Weight i 14 kg 🏷️ Model i Fullriver DCG ## Description [ ](https://www.fullriverbattery.com) ## Battery Fullriver DCG40-12 40Ah 12V The Battery FULLRIVER DCG40-12 40Ah 12V DCG Series belongs to the Fullriver DCG (Deep Cycle Cycle) batteries range that offers 28 superior gelified electrolyte batteries in this series for applications that best adapt to gel technology. DCG is the Fullriver Gel Deep Gel Batteries series.Like Fullriver's AGM battery options, DCG is designed for true deep deep cycle applications, with characteristics such as thick pure lead plates (99,994%), resistant welds on partition and a patented gel formulation designed for cycling years. DCG is suitable for all deep cycle applications, from commercials to personal, electric vehicles to solar sites. Deep cycle gel batteries is the highly reliable, safe and maintenance option. ### Ideal for: - Solar - Renewable energy - Golf cars - Recreational vehicles/caravan/motorhomes - Marina - Electric vehicles - Semi -trailer trucks - Trucks/Commercial Vehicles ### Battery advantages and characteristics FULLRIVER DCG40-12 40Ah 12V - Long useful life.Fullriver DCG gel batteries usually last more than their moist cell counterparts due to pure virgin lead to 99,994%, thick plates and without maintenance.The DCG series offers approximately 1300 cycles at 50% DOD (download depth). - Robust construction.Fullriver DCG is built with thick pure lead and welds on partition, which considerably increases vibration and impact resistance. - Advanced gel electrolyte: The patented Fullriver Tixotropic gel formula prevents stratification and increases the life of the cycle.Gel batteries also offer exceptional performance for slow discharge applications and extreme temperature environments. - Flexible installation.Gel batteries can be installed in any orientation, except face down, which allows you to place them in places where traditional wet cell batteries cannot.Gel batteries are recombinant and do not emit gases such as traditional wet cell batteries, which means you can mount them inside the cabin, as well as avoid cleaning the corrosion of the terminals. ### How to find the right battery for your vehicle or device? Although AGM technology is superior to other types of Fullriver batteries has shown that its AGM batteries are even superior to other manufacturers that also manufacture batteries with AGM technology.Its objective is to expand its products to a wide list of applications, which is why they have specific batteries for applications, from solar to races. We assure you that there is a Fullriver battery for each application, but if you are not sure what battery you need, do not hesitate to contact our customer service and advise you for free. ### Why choose a fullriver battery? Fullriver produces a wide range of batteries of 2, 6, 8 and 12 volts, in all sizes BCI, DIN and other international sizes.Each series of Fullriver batteries is designed to load and recharge hundreds of times, in addition all its sealed AGM and GEL batteries are maintenance free. ### Know more about fullriver Fullriver is an American manufacturer of batteries specialized in sealed agm batteries and maintenance, is one of the few companies that manufacture and get involved in the entire process of manufacturing their batteries, from the initial idea to the assembly according to technical specifications. This brand manufactures batteries with VRLA technology of the highest quality in the current market.Unlike what happens with other battery manufacturers, Fullriver controls the entire process of manufacturing its batteries: the foundry of the grid, the glue of plates and the final assembly are carried out in its factory.Which guarantees total quality control. Thanks to this they have obtained several quality control certifications that include;ISO9001, ISO14001, ISO18001, UL, CE and TEN for quality production systems. If you want additional information about Battery Fullriver DCG40-12, you can download the product's technical sheet at the following link: [ Download technical sheet Fullriver DCG40-12 40Ah 12V](/fichastecnicas/data-sheet-battery-fullriver-dcg40-12-40ah-12v-en.pdf) ## Frequently asked questions ### Is the Fullriver DCG40-12 an AGM battery and what are the benefits of AGM? Yes. The DCG40-12 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. ### How do I know if the DCG40-12 model fits my boat? Three ways: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team for the DCG40-12; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 9:00–18:00 CET). ### How do I fit the DCG40-12 model in my boat? In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How many years of warranty does the DCG40-12 model cover? This battery includes 2 years of official manufacturer warranty against manufacturing defects. It covers cell failures, internal short-circuits and abnormal capacity drops. It does NOT cover misuse (prolonged overcharging, inadequate charger, defective alternator). Once the defect is verified by technical inspection, we replace the DCG40-12 at no cost. ### When will I receive the DCG40-12 model? In mainland Spain and Portugal it arrives in 24 h if you order before 17:00 and the battery is in stock — it leaves the same day and arrives the next business day. Afternoon or weekend orders ship the next business day. For Balearics, Canaries and other EU destinations, allow 2-5 days. Shipping cost is calculated in the cart based on destination and service (standard, express, cash on delivery). Tracking number is sent by email + SMS as soon as the parcel ships. ### Can I return the Fullriver DCG40-12 battery if it doesn't fit or doesn't work? Yes. You have 14 days from delivery to return it. In mainland Spain and Portugal returns are FREE — we cover the return shipping cost via prepaid label. In other EU countries the return shipping cost is the customer's. It must arrive in its original packaging with no signs of installation. If it was defective, the warranty covers replacement even after the 14-day period. ### How much does the Fullriver DCG40-12 battery cost? The current price at baterias.com is 175,29 € (VAT included; 144,87 € excl. VAT), updated every 24 hours. The applicable VAT may vary with the destination country and is confirmed in the cart. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). ### Where can I buy the Fullriver DCG40-12 battery? At baterias.com — authorised distributor with real stock, 24h delivery in mainland Spain and Portugal if you order before 17:00, and full manufacturer warranty. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). Secure payment by card, Bizum, PayPal or bank transfer. If you choose at-home installation, our technician will take the used battery and dispose of it through an authorised collection point. ### How long does the Fullriver DCG40-12 battery last? Expected lifespan of the Fullriver DCG40-12 is 5 to 8 years in mild-climate boat use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured. ### What are the dimensions of the Fullriver DCG40-12 battery? Dimensions (length × width × height) are 198×166×171 mm — also written as 198x166x171 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. ### How many kilos does this battery weigh? It weighs 13,5 kg. Most of the weight is lead. If you plan to fit it yourself, use gloves and a carrying strap (AGM batteries are slightly heavier than conventional due to the absorbent glass-mat fibre). ### How many amps does the Fullriver DCG40-12 battery have? Nominal capacity 40 Ah[?cca: and [cold-cranking amps A]] at 12 V. Ah measure the total energy available (autonomy); CCA (also written A in cold or EN under the European standard) measure the instantaneous power to crank the starter motor. A battery with more CCA starts better in winter; one with more Ah keeps accessories on for longer. ### Will the Fullriver DCG40-12 battery fit my boat? Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 9:00–18:00 CET). The DCG40-12 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the DCG40-12 model? Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop boats. See the "Equivalents" section to view recommended options at the same performance level. ### Is the DCG40-12 model better than its equivalents from other brands? This battery and its equivalents from Bosch, Tudor or Exide are technically comparable: same dimensions, same voltage and same capacity. The differences are warranty (Varta and Bosch: 2 years; Tudor and Exide: 2 years on the equivalent line), manufacturing plant (Varta and Bosch share origin in the Clarios Group; Tudor and Exide belong to Stryten Energy) and price. For private use any of these brands will give 4-6 years of life. Compare them in the "Equivalents" section. ### What do users say about the Fullriver DCG40-12 battery? The average rating of the Fullriver DCG40-12 on baterias.com is 4.8/5 from 7 verified customer reviews. The product rating, when available, is shown above and in the "Reviews" section. You can also check our public Trustpilot profile at shop level (4.4/5 from 10,547+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped boats that need OBD registration after fitting. ## Reviews - **Average rating**: 4.8 / 5 (5 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-07-11*