Fullriver DCG120-12B · Caravan battery 12V 120Ah AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DCG120-12B |
| Voltage (V) | 12 |
| Capacity (C20) | 120Ah (c20) |
| Capacity (C5) | 105Ah (c5) |
| Technology | AGM |
| Length | 327.00 mm |
| Width | 182.00 mm |
| Height | 269.00 mm |
€543.20
VAT included
Fullriver DCG120-12B 12V 120Ah is a leisure battery for campers, motorhomes and caravans. Designed to power the entire interior kit (fridge, heater, water pump, USB, LED lighting) for several days off-grid, with no need to plug into a campsite hookup.
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
Voltage
12 V
Capacity
120 Ah
Dimensions
327×182×289 mm
Technology
AGM
Weight
39,5 kg
Model
DCG Series
Gracias a vosotros pude instalar correctamente la batería
Nicolas VargasPedí la batería un lunes a las 7 y me llegó el martes a las 4
Xavier DelgadoFueron de gran ayuda para instalar mi bateria
Juan Manuel Garrido
Reviews originally written in Spanish
Marine battery Fullriver DCG120-12B DCG 120Ah 12V
12VVoltage
120AhCapacity
39.50kgWeight
With 120 Ah at 12 V, the Fullriver DCG120-12B from the DCG range is built for motor and sailing boats, both for engine starting and onboard services. It replaces the original battery without adaptation in boats with a 327 × 182 × 269 mm format: same 120 Ah capacity.
- Powers onboard services: lights, sounder, GPS, fridge.
- Tolerates the daily cycling of a boat in season.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Reinforced case against vibration and swell.
Will it fit your current battery tray?
In terms of format, the Fullriver DCG120-12B measures 327 × 182 × 269 mm (length × width × height) and weighs 39.50 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.
What the Fullriver DCG120-12B is for
On board, the Fullriver DCG120-12B 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 39.50 kg and AP terminals.
The Fullriver DCG120-12B: DCG range and AGM technology
The DCG120-12B 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.
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. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Manufacturer's warranty
The Fullriver DCG120-12B comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Usage and maintenance tips
As a service battery, avoid routine discharges below 50% to extend its cycle life. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.
When you get it and how to return it
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.
BCOM-FULLRIVER-DCG120-12B
Data sheet
- Brand
- FULLRIVER
- Reference
- DCG120-12B
- Model
- FULLRIVER DCG
- Voltage (V)
- 12
- Length
- 327.00 mm
- Width
- 182.00 mm
- Height
- 269.00 mm
- Weight
- 39.5 Kgs
- Technology
- AGM
- Terminal type
- AP
- Capacity (C20)
- 120Ah (c20)
- Capacity (C5)
- 105Ah (c5)
Specific References
- MPN
- DCG120-12B
5,00/5
Latest reviews
Reviews originally written in Spanish
★★★★★Nicolas Vargas
21/05/2026Me asesoraron en la instalación
Gracias a vosotros pude instalar correctamente la batería
★★★★★Xavier Delgado
31/01/2026Recibí la batería en 1 día
Pedí la batería un lunes a las 7 y me llegó el martes a las 4
★★★★★Juan Manuel Garrido
06/11/2025Asesoramiento gratis
Fueron de gran ayuda para instalar mi bateria
Recommended accessories
How to change the battery
Guide to replace a marine battery (cranking or house) in 20-30 minutes. Moisture and vibration in marine environments require reinforced hold-downs and sealed copper terminals.
Step 1. Prepare the vehicle
Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.
Step 2. Locate the battery compartment
Usually under the passenger bench, engine room or a dedicated ventilated compartment. Verify the compartment is dry and well ventilated before opening.
Step 3. Disconnect the negative (−) terminal
Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Marine batteries are heavy (15-50 kg). If it has rope handles, use them; otherwise have a carry strap ready. Secure the new one with metal hold-downs (not plastic) to resist sea-state vibration.
Step 6. Install the new battery
Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.
Step 7. Connect the cables
Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.
Step 8. Verify circuit + water protection
Apply dielectric grease on terminals to prevent salt-air corrosion. Check the engine charging circuit delivers 13.8-14.4 V at 2,000 rpm.
Frequently asked questions
Is the DCG120-12B model AGM? What does this technology offer?
Yes. The DCG120-12B 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.
How is the Fullriver DCG120-12B battery installed in the vehicle?
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 does this battery last?
Expected lifespan of the Fullriver DCG120-12B 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 DCG120-12B battery?
Dimensions (length × width × height) are 327×182×289 mm — also written as 327x182x289 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 DCG120-12B 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 DCG120-12B typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Fullriver DCG120-12B?
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.
The top-rated online battery store in Spain
-
Audited by Trustpilot, no filters, no edits. The top-rated battery store in Spain.
Trustpilot · verified, no filters
-
Official Varta distributor
Official Varta wholesale distributor. 100% genuine batteries, recently manufactured, best price and no middlemen.
World’s best-selling battery brand
-
+100,000 satisfied customers
More than 100,000 customers already trust baterias.com — and recommend us to their friends and family.
They trust us and recommend us
Choose trust, choose quality, choose baterias.com.