Fullriver DCG40-12 · Wheelchair battery 40Ah AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DCG40-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 40Ah (c20) |
| Capacity (C5) | 33Ah (c5) |
| Technology | AGM |
| Length | 198.00 mm |
| Width | 166.00 mm |
| Height | 171.00 mm |
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
Where it fits: the Fullriver DCG40-12 is one of our boat batteries, belongs to our Fullriver batteries and by capacity it sits among our 40Ah batteries.

Marine battery Fullriver DCG40-12 DCG 40Ah 12V
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.
Fullriver DCG40-12: best-selling equivalent or higher-spec batteries
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
This battery
|
12V 40Ah | AGM | 175,90 € | |||||||||||||||||||||
MK Powered
M50-12 SLD M
MK Powered equivalent |
12V 50Ah | AGM | 154,90 € −21,00 € | |||||||||||||||||||||
| ||||||||||||||||||||||||
| DCG40-12 | M50-12 SLD M | |
|---|---|---|
| Capacity | 40 Ah | 50 Ah |
| Cold cranking (EN) | — | — |
| Technology | AGM | AGM |
| Dimensions (mm) | 198 × 166 × 171 | 199 × 166 × 171 |
| Positive terminal | — | — |
| Price | 175,90 € | 154,90 € |
Ritar
RA12-40B
Ritar equivalent Fullriver DCG40-12 vs Ritar RA12-40B
Ritar equivalent · −33,80 €
The Ritar alternative that fits where the DCG40-12 goes, with the same polarity. Compared with the DCG40-12 it has 2 Ah more. It costs 33,80 € less. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.
| DCG40-12 | RA12-40B | |
|---|---|---|
| Capacity | 40 Ah | 42 Ah |
| Cold cranking (EN) | — | — |
| Technology | AGM | AGM |
| Dimensions (mm) | 198 × 166 × 171 | 198 × 166 × 171 |
| Positive terminal | — | — |
| Price | 175,90 € | 142,10 € |
MK Powered
M45-12 SLD M
MK Powered equivalent Fullriver DCG40-12 vs MK Powered M45-12 SLD M
MK Powered equivalent · −26,40 €
It is the verified MK Powered equivalent for the DCG40-12 tray. Compared with the DCG40-12 it has 5 Ah more. It costs 26,40 € less. Decide by price, brand preference and availability: both fit and crank the same.
| DCG40-12 | M45-12 SLD M | |
|---|---|---|
| Capacity | 40 Ah | 45 Ah |
| Cold cranking (EN) | — | — |
| Technology | AGM | AGM |
| Dimensions (mm) | 198 × 166 × 171 | 199 × 166 × 171 |
| Positive terminal | — | — |
| Price | 175,90 € | 149,50 € |
Q-battery
BATTERY-12LCP-50
Q-battery equivalent Fullriver DCG40-12 vs Q-battery BATTERY-12LCP-50
Q-battery equivalent · +24,20 €
The Q-battery alternative that fits where the DCG40-12 goes, with the same polarity. Compared with the DCG40-12 it has 10 Ah more. It costs 24,20 € more. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.
| DCG40-12 | BATTERY-12LCP-50 | |
|---|---|---|
| Capacity | 40 Ah | 50 Ah |
| Cold cranking (EN) | — | — |
| Technology | AGM | AGM |
| Dimensions (mm) | 198 × 166 × 171 | 198 × 166 × 171 |
| Positive terminal | — | — |
| Price | 175,90 € | 200,10 € |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Other 40Ah batteries: We stock 23 models of 40 Ah to compare by price, technology and cold cranking: see all 40Ah batteries. Same size (198 × 166 × 171 mm): batteries of 198 × 166 × 171 mm.
Recommended accessories
Frequently asked questions
Is the Fullriver DCG40-12 an AGM battery and what are the benefits of AGM?
Yes. AGM (Absorbent Glass Mat) technology, 40 Ah and 12 V: sealed lead-acid, with the electrolyte held in glass fibre. It tolerates heat better and handles more cycles than a conventional battery.
Is this a starting or a service (leisure) battery?
Service: it is designed to power electronics, lights, the fridge or the windlass for hours, withstanding deep discharges. On boats with two circuits the ideal is one starting battery and one service battery.
In what position can it be installed on the boat?
Being AGM, it is sealed and does not spill: it can be mounted tilted (never upside down) and copes well with vibration and wave impacts. Secure it firmly and keep the terminals away from water.
What are the dimensions of the Fullriver DCG40-12 battery?
Measure the battery tray before ordering: a one-millimetre difference is enough for the hold-down clamp not to close. It measures 198×166×171 mm in length × width × height, with the terminals included in the height.
Fullriver DCG40-12 or MK Powered M50-12 SLD M: which one to choose?
It is the verified MK Powered equivalent for the DCG40-12 tray. Compared with the DCG40-12 it has 10 Ah more. It costs 21,00 € less. Decide by price, brand preference and availability: both fit and crank the same.
Fullriver DCG40-12 or Ritar RA12-40B: which one to choose?
The Ritar alternative that fits where the DCG40-12 goes, with the same polarity. Compared with the DCG40-12 it has 2 Ah more. It costs 33,80 € less. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.
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