# Fullriver DC120-12B · Boat battery 12V 120Ah 760A

![Fullriver DC120-12B · Boat battery 12V 120Ah 760A](https://bateriasonline.es/2310-home_default/fullriver-dc120-12b.jpg)

> Fullriver DC120-12B: 120 Ah boat battery, 760 A (EN), 331×175×218 mm, AGM. VAT included and shipping cost shown before you pay.

**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-dc120-12b
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-DC120-12B
- **MPN**: DC120-12B
- **Price**: 413,76 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fullriver |
| Range | DC Series |
| Application | Boats |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 120 Ah |
| Cold cranking amps (EN) | 760 A |
| Length | 331 mm |
| Width | 175 mm |
| Height | 218 mm |
| Weight | 36.5 kg |
| Terminal type | M8 |

## Quick description

The Fullriver DC120-12B is a boat battery with 12 V, 120 Ah and 760 A cold cranking current, measuring 331 × 175 × 218 mm.

## Description

## Where the Fullriver DC120-12B fits

The Fullriver DC120-12B 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 DC120-12B belongs to the Fullriver DC Series range. [More Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## AGM technology in the DC120-12B

The DC120-12B is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Fullriver DC120-12B vs DC115-12B, DC115-12 and FT1100-31ST: differences

How the DC120-12B compares with Fullriver batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver DC120-12B (this one) | 120 Ah | 760 A | 331 × 175 × 218 | 36.5 kg |
| Fullriver DC115-12B | 115 Ah | 605 A | 331 × 171 × 218 | 32.9 kg |
| Fullriver DC115-12 | 115 Ah | 760 A | 328 × 172 × 241 | 32.7 kg |
| Fullriver FT1100-31ST | 110 Ah | 1,100 A | 330 × 173 × 232 | 34.1 kg |

- Fullriver DC115-12B: 5 Ah less, 155 A less cranking power, a different case (331 × 171 × 218 mm).
- Fullriver DC115-12: 5 Ah less, the same cranking power, a different height (241 mm instead of 218 mm). It only fits if there is room for 241 mm of height.
- Fullriver FT1100-31ST: 10 Ah less, 340 A more cranking power, a different case (330 × 173 × 232 mm).

## Equivalents and alternatives to the Fullriver DC120-12B

We have no other battery with exactly the dimensions and polarity of the DC120-12B. Browse the rest of our [marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries) to compare close options.

## Part numbers and codes for the Fullriver DC120-12B

The DC120-12B is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | DC120-12B |
|---|---|
| Terminal type | M8 |
| Not to be confused with | Fullriver DCG120-12B (120 Ah), Fullriver DC120-12A (120 Ah, 750 A), Fullriver DC120-12C (120 Ah, 750 A) |

## Check this before ordering the Fullriver DC120-12B

- Cold cranking: 760 A (EN), equal to or higher than the original.
- With 120 Ah, the DC120-12B replaces an original battery of that capacity or slightly less.
- Length, width and height of the DC120-12B: 331 × 175 × 218 mm.

## Frequently asked questions about the Fullriver DC120-12B

### DC120-12B or DC115-12B: which one suits me?

Compared with the DC120-12B, the Fullriver DC115-12B has 5 Ah less and 155 A less cranking power. The DC120-12B cranks harder; the DC115-12B is only a good option if your original battery says 605 A or less. Mind the space: the DC115-12B measures 331 × 171 × 218 mm.

### Fullriver DC120-12B or DC115-12: what changes?

Mainly the height: the DC120-12B is 218 mm tall and the Fullriver DC115-12 241 mm, with the same length and width. In capacity and cranking power, the DC115-12 offers 115 Ah and 760 A against 120 Ah and 760 A. Before choosing between the DC120-12B and the DC115-12, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Fullriver DC120-12B weigh?

36.5 kg, with 120 Ah of capacity. For reference, the Fullriver DC115-12B (115 Ah) weighs 32.9 kg.

### Which charger does the Fullriver DC120-12B need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## More batteries to compare with the DC120-12B

- [More marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [More Fullriver models](https://bateriasonline.es/en/fullriver-batteries)
- [Fullriver FT1150-6T](https://bateriasonline.es/en/fullriver-ft1150-6t) · 120 Ah, 1,150 A, 280×265×225 mm

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