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Fullriver DCG40-12 · Wheelchair battery 12V 40Ah AGM

Specifications

BrandFULLRIVER
Part numberDCG40-12
Voltage (V)12
Capacity (C20)40Ah (c20)
Capacity (C5)33Ah (c5)
TechnologyAGM
Length198.00 mm
Width166.00 mm
Height171.00 mm
See the full specifications →
Price: €175.90
VAT included
Quantity
  • 24-48h delivery
  • 14-day returns
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Brand: FULLRIVER batteries Part number: DCG40-12

Fullriver DCG40-12 12V 40Ah is a deep-cycle battery for wheelchairs and mobility scooters, optimised to be discharged and recharged daily down to 80 % DOD without losing range.

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
40 Ah C20
Dimensions
198×166×171 mm
Technology
AGM
Weight
13,5 kg
Model
DCG Series
Logo Fullriver

Marine battery Fullriver DCG40-12 DCG 40Ah 12V

12VVoltage
40AhCapacity
13.50kgWeight

The Fullriver DCG40-12 marine battery offers 12 V, 40 Ah from the DCG range with AGM technology, designed for motor and sailing boats, both for engine starting and onboard services. It replaces the original battery without adaptation in boats with a 198 × 166 × 171 mm format: same 40 Ah capacity.

In short: the Fullriver DCG40-12 (40 Ah, 198 × 166 × 171 mm). Verified equivalent alternatives: MK Powered M50-12 SLD M and Ritar RA12-40B.

  • AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
  • Reinforced case against vibration and swell.
  • Powers onboard services: lights, sounder, GPS, fridge.
  • Tolerates the daily cycling of a boat in season.

Will it fit your current battery tray?

The Fullriver DCG40-12 is made in the 198 × 166 × 171 mm format and weighs 13.50 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.

What the Fullriver DCG40-12 is for

The Fullriver DCG40-12 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 13.50 kg and M6 terminals.

The Fullriver DCG40-12: DCG range and AGM technology

The DCG is the Fullriver range the DCG40-12 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.

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.

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.

Warranty and coverage

The Fullriver DCG40-12 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

How to make it last longer

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.

When you get it and how to return it

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.

  • Reference
    BCOM-FULLRIVER-DCG40-12

Data sheet

  • Brand
    FULLRIVER
  • Reference
    DCG40-12
  • Model
    FULLRIVER DCG
  • Voltage (V)
    12
  • Length
    198.00 mm
  • Width
    166.00 mm
  • Height
    171.00 mm
  • Weight
    13.5 Kgs
  • Technology
    AGM
  • Terminal type
    M6
  • Capacity (C20)
    40Ah (c20)
  • Capacity (C5)
    33Ah (c5)

Specific References

  • MPN
    DCG40-12

Comparison: Fullriver DCG40-12 vs equivalents — alternatives with the same dimensions, Ah and CCA

The Fullriver DCG40-12 is interchangeable with these equivalent references: M50-12 SLD M (MK Powered), RA12-40B (Ritar), M45-12 SLD M (MK Powered), BATTERY-12LCP-50 (Q-battery).

Product Specifications Technology Price
Fullriver DCG40-12 Fullriver DCG40-12 This battery 12V 40Ah AGM €175.90
MK Powered M50-12 SLD M MK Powered M50-12 SLD M 12V 50Ah AGM €154.90
Ritar RA12-40B Ritar RA12-40B 12V 42Ah AGM €142.10
MK Powered M45-12 SLD M MK Powered M45-12 SLD M 12V 45Ah AGM €149.50
Q-battery BATTERY-12LCP-50 Q-battery BATTERY-12LCP-50 12V 50Ah AGM €200.10

Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.

Recommended accessories — complement the Fullriver DCG40-12 with a charger or tester

Frequently asked questions

Is the Fullriver DCG40-12 an AGM battery and what are the benefits of AGM?

Yes. The DCG40-12 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 do I fit the DCG40-12 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 DCG40-12 battery last?

Expected lifespan of the Fullriver DCG40-12 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 DCG40-12 battery?

Dimensions (length × width × height) are 198×166×171 mm — also written as 198x166x171 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 DCG40-12 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 DCG40-12 typically fits a wide range of European vehicles thanks to its standard DIN case format.

What are the equivalents of the DCG40-12 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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