# Fullriver DC40-12 · Boat battery 12V 40Ah 275A

![Fullriver DC40-12 · Boat battery 12V 40Ah 275A](https://bateriasonline.es/2525-home_default/fullriver-dc40-12.jpg)

> Fullriver DC40-12: 40 Ah boat battery, 275 A (EN), 198×166×174 mm, AGM. Equivalent to Fullriver DC38-12.

**Category:** [Marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries) → [Fullriver](https://bateriasonline.es/en/fullriver-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fullriver-dc40-12
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-DC40-12
- **MPN**: DC40-12
- **Price**: 159,41 € (VAT incl., Spain)
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fullriver |
| Range | DC Series |
| Application | Boats |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 40 Ah |
| Cold cranking amps (EN) | 275 A |
| Length | 198 mm |
| Width | 166 mm |
| Height | 174 mm |
| Weight | 13.4 kg |
| Terminal type | M6 |

## Quick description

Fullriver DC40-12: boat battery with 12 V, 40 Ah and 275 A cold cranking current, measuring 198 × 166 × 174 mm.

## Description

## Who the Fullriver DC40-12 is for

The Fullriver DC40-12 is a battery for boats: engine starting or on-board service, depending on its design, with resistance to damp and hull vibration. Check whether your boat needs starting, service or a dual-purpose battery before choosing.
The DC40-12 belongs to the Fullriver DC Series range. [See all Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## Equivalents and alternatives to the Fullriver DC40-12

As the DC40-12 is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fullriver DC38-12 | AGM | 38 Ah | 265 A | 198 × 166 × 171 |

## Fullriver DC40-12 vs DC38-12 and DC50-12B

The real differences between the DC40-12 and the closest Fullriver models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver DC40-12 (this one) | 40 Ah | 275 A | 198 × 166 × 174 | 13.4 kg |
| Fullriver DC38-12 | 38 Ah | 265 A | 198 × 166 × 171 | 13.5 kg |
| Fullriver DC50-12B | 50 Ah | 270 A | 198 × 166 × 171 | 14.9 kg |

- Fullriver DC38-12: 2 Ah less, 10 A less cranking power, a different case (198 × 166 × 171 mm).
- Fullriver DC50-12B: 10 Ah more, 5 A less cranking power, a different case (198 × 166 × 171 mm).

## Inside the DC40-12: AGM technology

The DC40-12 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the DC40-12 can be fitted in the boot or under a seat with no risk of spills.

## What to look at before buying the DC40-12

- The DC40-12 needs 198 × 166 × 174 mm of space: measure it with the hold-down clamp in place.
- With 40 Ah, the DC40-12 replaces an original battery of that capacity or slightly less.
- Cold cranking: 275 A (EN), equal to or higher than the original.

## Fullriver DC40-12 codes and part numbers

Look for any of these DC40-12 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | DC40-12 |
|---|---|
| Terminal type | M6 |
| Not to be confused with | Fullriver DCG40-12 (40 Ah), Fullriver DC10-12 (10 Ah), Fullriver DC140-12 (140 Ah, 795 A) |

## Frequently asked questions about the Fullriver DC40-12

### Fullriver DC40-12 or DC38-12?

Compared with the DC40-12, the Fullriver DC38-12 has 2 Ah less and 10 A less cranking power. The DC40-12 cranks harder; the DC38-12 is only a good option if your original battery says 265 A or less. Mind the space: the DC38-12 measures 198 × 166 × 171 mm.

### How much does the Fullriver DC40-12 weigh?

The DC40-12 weighs 13.4 kg. For reference, the Fullriver DC38-12 (38 Ah) weighs 13.5 kg.

### Which battery is equivalent to the Fullriver DC40-12?

Only other AGM batteries with its dimensions and polarity: Fullriver DC38-12. Neither an EFB nor a conventional battery replaces the DC40-12.

## Keep comparing: alternatives to the DC40-12

- [All marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [The whole Fullriver range](https://bateriasonline.es/en/fullriver-batteries)
- [Fullriver FT560L](https://bateriasonline.es/en/fullriver-ft560l) · 44 Ah, 560 A, 198×166×180 mm
- [Fullriver FT560](https://bateriasonline.es/en/fullriver-ft560) · 44 Ah, 560 A, 198×166×180 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*