Fullriver DC120-12D · Marine battery 12V 120Ah 750A AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DC120-12D |
| Voltage (V) | 12 |
| Capacity (C20) | 120Ah (c20) |
| Capacity (C5) | 98Ah (c5) |
| Technology | AGM |
| Length | 260.00 mm |
| Width | 180.00 mm |
| Height | 301.00 mm |
€422.20
VAT included
4,64/5★★★★★8 reviewsVerified purchases
- ★★★★Tomas Iglesias:
Me ayudaron a elegir mi batería y, además, me ayudaron en la instalación
- ★★★★★Alex Santana:
Estupenda pagina web
- ★★★★Juan Antonio Mendez:
Fueron de gran ayuda al momento de elegir la batería y de instalarla.
Fullriver DC120-12D 12V 120Ah 750A is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea.
Why this marine battery?
- Marine designbuilt for boat swell and vibration
- Dual functionstarts the engine and powers onboard services
- Sealed and safemaintenance-free even when the boat rolls
Voltage
12 V
Capacity
120 Ah
Cold cranking
750 A
Dimensions
260×180×301 mm
Technology
AGM
Weight
38,7 kg
Model
DC Series
Marine battery Fullriver DC120-12D DC 120Ah 750A 12V
12VVoltage
120AhCapacity
750ACold cranking
35.60kgWeight
With 120 Ah at 12 V and 750 A of cold cranking current (EN), the Fullriver DC120-12D from the DC range is built for motor and sailing boats, both for engine starting and onboard services. Measuring 260 × 180 × 301 mm, it is the direct replacement for boats fitted from the factory with a 120 Ah battery of this format.
- Sealed: no spills or gases in the locker.
- Resistant to humidity and salt air.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Ready for starting outboard and inboard engines.
What the Fullriver DC120-12D is for
The Fullriver DC120-12D is designed for motor and sailing boats, both for engine starting and onboard services. If it is your starter battery, run the services from a separate battery; if it is a service battery, avoid routinely discharging it beyond 50%. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 35.60 kg and M8 terminals.
Size, terminals and hold-down of the Fullriver DC120-12D
In terms of format, the Fullriver DC120-12D measures 260 × 180 × 301 mm (length × width × height) and weighs 35.60 kg. It uses M8 terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.
What Fullriver does differently
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.
The Fullriver DC120-12D: DC range and AGM technology
Within the Fullriver catalogue, the DC series groups the references designed for this use. The DC120-12D is the 120 Ah model of that family, with the same performance as its siblings in other sizes.
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.
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.
Warranty and coverage
The Fullriver DC120-12D comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Delivery times and returns
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.
BCOM-FULLRIVER-DC120-12D
Data sheet
- Brand
- FULLRIVER
- Reference
- DC120-12D
- Model
- FULLRIVER DC
- Voltage (V)
- 12
- Length
- 260.00 mm
- Width
- 180.00 mm
- Height
- 301.00 mm
- Weight
- 35.60 Kgs
- Technology
- AGM
- Terminal type
- M8
- Cold cranking amps (EN)
- 750
- Capacity (C20)
- 120Ah (c20)
- Capacity (C5)
- 98Ah (c5)
Specific References
- MPN
- DC120-12D
4,64/5
Verified purchasesLatest verified reviews
★★★★★Tomas Iglesias
01/06/2026Gracias por sus indicaciones
Me ayudaron a elegir mi batería y, además, me ayudaron en la instalación
★★★★★Alex Santana
03/02/2026Correcto
Estupenda pagina web
★★★★★Juan Antonio Mendez
13/01/2026Trato y ayuda inmejorable, gracias
Fueron de gran ayuda al momento de elegir la batería y de instalarla.
★★★★★Diego Prieto
27/12/2025Servicio ideal
Esta web tiene un gran servicio al cliente.
★★★★★Rafael Mendez
14/12/2025Me indicaron cómo instalar la batería
Me ayudaron a elegir mi bateria y, además, me ayudaron en la instalación
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 this battery AGM? What is it for?
Yes. The DC120-12D 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 DC120-12D 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 long does the Fullriver DC120-12D battery last?
Expected lifespan of the Fullriver DC120-12D 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 DC120-12D battery?
Dimensions (length × width × height) are 260×180×301 mm — also written as 260x180x301 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 DC120-12D 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 DC120-12D typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Fullriver DC120-12D?
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.