Fullriver DC120-12C · Marine battery 12V 120Ah 750A AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DC120-12C |
| Voltage (V) | 12 |
| Capacity (C20) | 120Ah (c20) |
| Capacity (C5) | 98Ah (c5) |
| Technology | AGM |
| Length | 341.00 mm |
| Width | 172.00 mm |
| Height | 283.00 mm |
€441.90
VAT included
4,69/5★★★★★11 reviewsVerified purchases
- ★★★★★Salvador Castro:
Me ayudaron a elegir mi batería y, además, me ayudaron en la instalación
- ★★★★★Jose Manuel Gomez:
Esta web tiene un gran servicio al cliente.
- ★★★★★Aitor Alonso:
Fueron de gran ayuda al momento de elegir la batería y de instalarla.
Fullriver DC120-12C 12V 120Ah 750A 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 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
344×172×283 mm
Technology
AGM
Weight
38,7 kg
Model
DC Series
Marine battery Fullriver DC120-12C DC 120Ah 750A 12V
12VVoltage
120AhCapacity
750ACold cranking
38.70kgWeight
The Fullriver DC120-12C with AGM technology is a marine battery with 120 Ah and 750 A of cold cranking current (EN) for motor and sailing boats, both for engine starting and onboard services. It measures 341 × 172 × 283 mm, the format sought by anyone replacing a 120 Ah battery in boats.
- Tolerates the daily cycling of a boat in season.
- Powers onboard services: lights, sounder, GPS, fridge.
- Reinforced case against vibration and swell.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
What the Fullriver DC120-12C is for
On board, the Fullriver DC120-12C 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 38.70 kg and AP terminals.
Size, terminals and hold-down of the Fullriver DC120-12C
In terms of format, the Fullriver DC120-12C measures 341 × 172 × 283 mm (length × width × height) and weighs 38.70 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.
Fullriver: the maker behind the DC120-12C
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.
The Fullriver DC120-12C: DC range and AGM technology
Within the Fullriver catalogue, the DC series groups the references designed for this use. The DC120-12C is the 120 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.
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. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.
Official warranty
The Fullriver DC120-12C 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-DC120-12C
Data sheet
- Brand
- FULLRIVER
- Reference
- DC120-12C
- Model
- FULLRIVER DC
- Voltage (V)
- 12
- Length
- 341.00 mm
- Width
- 172.00 mm
- Height
- 283.00 mm
- Weight
- 38.70 Kgs
- Technology
- AGM
- Terminal type
- AP
- Cold cranking amps (EN)
- 750
- Capacity (C20)
- 120Ah (c20)
- Capacity (C5)
- 98Ah (c5)
Specific References
- MPN
- DC120-12C
4,69/5
Verified purchasesLatest verified reviews
★★★★★Salvador Castro
02/07/2026Me indicaron cómo instalar la batería
Me ayudaron a elegir mi batería y, además, me ayudaron en la instalación
★★★★★Jose Manuel Gomez
06/02/2026Me encantan
Esta web tiene un gran servicio al cliente.
★★★★★Aitor Alonso
12/01/2026Te asesoran gratis
Fueron de gran ayuda al momento de elegir la batería y de instalarla.
★★★★★Alfredo Ruiz
27/12/2025Perfecto
Estupenda pagina web
★★★★★Hugo Moya
06/12/2025Me ayudaron a poner 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 the DC120-12C model AGM? What does this technology offer?
Yes. The DC120-12C 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 change this battery step by step?
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.
What is the service life of the DC120-12C model?
Expected lifespan of the Fullriver DC120-12C 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 DC120-12C battery?
Dimensions (length × width × height) are 344×172×283 mm — also written as 344x172x283 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 DC120-12C 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 DC120-12C typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Fullriver DC120-12C?
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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