Fullriver DCG120-12A · Caravan battery 12V 120Ah AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DCG120-12A |
| Voltage (V) | 12 |
| Capacity (C20) | 120Ah (c20) |
| Capacity (C5) | 105Ah (c5) |
| Technology | AGM |
| Length | 341.00 mm |
| Width | 172.00 mm |
| Height | 264.00 mm |
Fullriver DCG120-12A 12V 120Ah is a battery for auxiliary services in motorhomes, caravans and campers. Powers the fridge, interior lighting, water pump and sockets while parked, with no need for campsite mains. Withstands daily discharges throughout the season.
Why this caravan battery?
- Real off-grid autonomyno campsite hookup needed
- Lasts the whole seasonhandles daily discharges without capacity loss
- Powers it all at oncefridge, water pump, LED and USB without issues

Marine battery Fullriver DCG120-12A DCG 120Ah 12A 12V
With 120 Ah at 12 V and 12 A of cold cranking current (EN), the Fullriver DCG120-12A from the DCG range is built for motor and sailing boats, both for engine starting and onboard services. It measures 341 × 172 × 264 mm, the format sought by anyone replacing a 120 Ah battery in boats.
- Reinforced case against vibration and swell.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Tolerates the daily cycling of a boat in season.
- Powers onboard services: lights, sounder, GPS, fridge.
What the Fullriver DCG120-12A is for
With 120 Ah, the Fullriver DCG120-12A 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 38.60 kg and AP terminals.
Size, terminals and hold-down of the Fullriver DCG120-12A
It has external dimensions of 341 × 172 × 264 mm and weighs 38.60 kg. It uses AP 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 DCG120-12A: DCG range and AGM technology
The DCG120-12A is part of the Fullriver DCG 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.
Fullriver: the maker behind the DCG120-12A
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 DCG120-12A 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. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Shipping, delivery and returns
Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.
Data sheet
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BrandFULLRIVER
-
ReferenceDCG120-12A
-
ModelFULLRIVER DCG
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Voltage (V)12
-
Length341.00 mm
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Width172.00 mm
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Height264.00 mm
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Weight38.6 Kgs
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TechnologyAGM
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Terminal typeAP
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Capacity (C20)120Ah (c20)
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Capacity (C5)105Ah (c5)
Specific References
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MPNDCG120-12A
Recommended accessories
Frequently asked questions
Is the Fullriver DCG120-12A an AGM battery and what are the benefits of AGM?
Yes. The DCG120-12A 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 fit the DCG120-12A 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 our blog. 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 long does the Fullriver DCG120-12A battery last?
Expected lifespan of the Fullriver DCG120-12A 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 DCG120-12A battery?
Dimensions (length × width × height) are 341×172×283 mm — also written as 341x172x283 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.
Will the Fullriver DCG120-12A 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 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The DCG120-12A typically fits a wide range of European vehicles thanks to its standard DIN case format.
What are the equivalents of the DCG120-12A 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.
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