Fullriver DCG77-12 · Wheelchair battery 12V 77Ah AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DCG77-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 77Ah (c20) |
| Capacity (C5) | 66Ah (c5) |
| Technology | AGM |
| Length | 260.00 mm |
| Width | 169.00 mm |
| Height | 241.00 mm |
€310.20
VAT included
4,28/5★★★★★6 reviewsVerified purchases
- ★★★★Oscar Pastor:
No tenía ni idea de cómo instalar la batería en mi coche y me ayudaron a instalarla correctamente. Muchas gracias
- ★★★★Vicente Soler:
Pedí la batería un lunes a las 7 y me llegó el martes a las 4
- ★★★★Felix Gutierrez:
Si tienes dudas con la instalación puedes llamar y te asesoran.
Reviews originally written in Spanish
See all 6 reviewsFullriver DCG77-12 12V 77Ah is a sealed AGM/GEL battery for daily mobility use: maintenance-free, no risk of spills, and thousands of useful cycles well beyond a starter battery.
Why this wheelchair battery?
- Daily cycling without wearhandles deep discharges without losing capacity
- Sealed AGM/GELno maintenance, no risk of spills
- Thousands of useful cyclesover its full lifetime
Voltage
12 V
Capacity
77 Ah
Dimensions
260×169×215 mm
Technology
AGM
Weight
24,2 kg
Model
DCG Series
Marine battery Fullriver DCG77-12 DCG 77Ah 12V
12VVoltage
77AhCapacity
24.20kgWeight
The Fullriver DCG77-12 with AGM technology is a marine battery with 77 Ah for motor and sailing boats, both for engine starting and onboard services. It measures 260 × 169 × 241 mm, the format sought by anyone replacing a 77 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 DCG77-12 is for
The Fullriver DCG77-12 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 24.20 kg and M6 terminals.
Will it fit your current battery tray?
The Fullriver DCG77-12 is made in the 260 × 169 × 241 mm format and weighs 24.20 kg. It uses M6 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.
The Fullriver DCG77-12: DCG range and AGM technology
The DCG77-12 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 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.
Why choose Fullriver batteries
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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
Warranty and coverage
The Fullriver DCG77-12 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Care and maintenance
Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections. At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up.
Shipping, delivery and returns
Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
BCOM-FULLRIVER-DCG77-12
Data sheet
- Brand
- FULLRIVER
- Reference
- DCG77-12
- Model
- FULLRIVER DCG
- Voltage (V)
- 12
- Length
- 260.00 mm
- Width
- 169.00 mm
- Height
- 241.00 mm
- Weight
- 24.2 Kgs
- Technology
- AGM
- Terminal type
- M6
- Capacity (C20)
- 77Ah (c20)
- Capacity (C5)
- 66Ah (c5)
Specific References
- MPN
- DCG77-12
4,28/5
Verified purchasesLatest verified reviews
Reviews originally written in Spanish
★★★★★Oscar Pastor
08/07/2026Gracias por su ayuda
No tenía ni idea de cómo instalar la batería en mi coche y me ayudaron a instalarla correctamente. Muchas gracias
★★★★★Vicente Soler
16/01/2026Llega al día siguiente
Pedí la batería un lunes a las 7 y me llegó el martes a las 4
★★★★★Felix Gutierrez
09/01/2026La ayuda muy útil
Si tienes dudas con la instalación puedes llamar y te asesoran.
★★★★★Santiago PeÑa
24/12/2025Buena calidad
Me ayudaron con la instalación de mi batería
★★★★★Daniel Marquez
02/10/2025Me ayudaron a instalar la batería
No tenía ni idea de cómo instalar la bateria en mi coche y me ayudaron a instalarla correctamente. Muchas gracias
Comparison: Fullriver DCG77-12 vs equivalents
The Fullriver DCG77-12 is interchangeable with these equivalent references: DCG65-12 (Fullriver), BATTERY-12LC-75 (Q-battery).
| Product | Specifications | Technology | Price |
|---|---|---|---|
Fullriver
DCG77-12
This battery
|
12V 77Ah | AGM | €310.20 |
Fullriver
DCG65-12
|
12V 65Ah | AGM | €289.50 |
Q-battery
BATTERY-12LC-75
|
12V 77Ah | AGM | €292.30 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
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 DCG77-12 model AGM? What does this technology offer?
Yes. The DCG77-12 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 is the Fullriver DCG77-12 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 DCG77-12 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 DCG77-12 battery?
Dimensions (length × width × height) are 260×169×215 mm — also written as 260x169x215 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.
Does this 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 DCG77-12 typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Fullriver DCG77-12?
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.