# Fullriver DC20-12 · Boat battery 12V 20Ah 135A

![Fullriver DC20-12 · Boat battery 12V 20Ah 135A](https://bateriasonline.es/2386-home_default/fullriver-dc20-12.jpg)

> Fullriver DC20-12: 20 Ah boat battery, 135 A (EN), 181×77×167 mm, AGM. Compare sizes and equivalents; 14-day returns.

**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-dc20-12
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-DC20-12
- **MPN**: DC20-12
- **Price**: 83,89 € (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 | 20 Ah |
| Cold cranking amps (EN) | 135 A |
| Length | 181 mm |
| Width | 77 mm |
| Height | 167 mm |
| Weight | 6.44 kg |
| Terminal type | M5 |

## Quick description

Fullriver DC20-12: boat battery with 12 V, 20 Ah and 135 A cold cranking current, measuring 181 × 77 × 167 mm.

## Description

## Where the Fullriver DC20-12 fits

The Fullriver DC20-12 is made for marine use. With 20 Ah, the DC20-12 suits boats that had a battery of that capacity.
The DC20-12 belongs to the Fullriver DC Series range. [More Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## AGM technology in the DC20-12

Inside, the DC20-12 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Fullriver DC20-12 vs FT230 and FT230L: which one to choose?

The real differences between the DC20-12 and the closest Fullriver models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver DC20-12 (this one) | 20 Ah | 135 A | 181 × 77 × 167 | 6.44 kg |
| Fullriver FT230 | 20 Ah | 230 A | 181 × 77 × 167 | 7 kg |
| Fullriver FT230L | 20 Ah | 230 A | 181 × 77 × 167 | 7 kg |

- Fullriver FT230: the same capacity, 95 A more cranking power, the same dimensions.
- Fullriver FT230L: the same capacity, 95 A more cranking power, the same dimensions.

## Equivalents and alternatives to the Fullriver DC20-12

We have no other battery with exactly the dimensions and polarity of the DC20-12. 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 DC20-12

Shops, garages and catalogues identify the DC20-12 with these codes:

| Commercial reference | DC20-12 |
|---|---|
| Terminal type | M5 |
| Not to be confused with | Fullriver DC10-12 (10 Ah), Fullriver DC210-12 (210 Ah), Fullriver DC220-12 (220 Ah, 1,150 A) |

## What to look at before buying the DC20-12

- Check the EN amps on your battery: if it says 135 A or less, the DC20-12 covers your engine.
- Capacity of the DC20-12: 20 Ah; the same as your current battery or slightly more is fine.
- The DC20-12 needs 181 × 77 × 167 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fullriver DC20-12

### DC20-12 or FT230: which one suits me?

Compared with the DC20-12, the Fullriver FT230 has 95 A more cranking power. If your current battery says 230 A or more, choose the FT230; if it says 135 A or less, the DC20-12 is enough. Both measure 181 × 77 × 167 mm, so they fit the same tray.

### How much does the Fullriver DC20-12 weigh?

6.44 kg, with 20 Ah of capacity. For reference, the Fullriver FT230 (20 Ah) weighs 7 kg.

### How do I look after the boat battery in winter?

Leave it 100% charged, disconnected or on a marine maintenance charger. A battery that spends the winter half-discharged loses capacity permanently.

## Keep comparing: alternatives to the DC20-12

- [All marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [More Fullriver models](https://bateriasonline.es/en/fullriver-batteries)
- [Fullriver FT230D](https://bateriasonline.es/en/fullriver-ft230d) · 22 Ah, 180 A, 181×77×167 mm

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