# Fullriver FT500 · Boat battery 12V 40Ah 500A

![Fullriver FT500 · Boat battery 12V 40Ah 500A](https://bateriasonline.es/2491-home_default/fullriver-ft500.jpg)

> Fullriver FT500: 40 Ah boat battery, 500 A (EN), 250×97×206 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-ft500
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-FT500
- **MPN**: FT500
- **Price**: 207,68 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fullriver |
| Range | Full Throttle Series |
| Application | Boats |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 40 Ah |
| Cold cranking amps (EN) | 500 A |
| Length | 250 mm |
| Width | 97 mm |
| Height | 206 mm |
| Weight | 14 kg |
| Terminal type | M6 M |

## Quick description

The Fullriver FT500 is a boat battery with 12 V, 40 Ah and 500 A cold cranking current, measuring 250 × 97 × 206 mm.

## Description

## The Fullriver FT500 at a glance

The Fullriver FT500 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 FT500 belongs to the Fullriver Full Throttle Series range. [More Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## AGM technology in the FT500

The FT500 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FT500 can be fitted in the boot or under a seat with no risk of spills.

## Fullriver FT500 vs FT450 and FT438-U1: differences

Torn between the FT500 and another similar Fullriver? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver FT500 (this one) | 40 Ah | 500 A | 250 × 97 × 206 | 14 kg |
| Fullriver FT450 | 30 Ah | 450 A | 250 × 97 × 156 | 10.6 kg |
| Fullriver FT438-U1 | 35 Ah | 438 A | 196 × 131 × 192 | 11.3 kg |

- Fullriver FT450: 10 Ah less, 50 A less cranking power, a different case (250 × 97 × 156 mm).
- Fullriver FT438-U1: 5 Ah less, 62 A less cranking power, a different case (196 × 131 × 192 mm).

## Equivalents and alternatives to the Fullriver FT500

No other reference in the catalogue fully matches the dimensions and polarity of the FT500; you will find the closest ones among our [marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries).

## Fullriver FT500 codes and part numbers

Look for any of these FT500 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FT500 |
|---|---|
| Terminal type | M6M |
| Not to be confused with | Fullriver FT100 (8 Ah, 100 A), Fullriver FT200 (14 Ah, 200 A), Fullriver FT560 (44 Ah, 560 A) |

## Before ordering the FT500, check this

- Cold cranking: 500 A (EN), equal to or higher than the original.
- Capacity of the FT500: 40 Ah; the same as your current battery or slightly more is fine.
- Length, width and height of the FT500: 250 × 97 × 206 mm.

## Frequently asked questions about the Fullriver FT500

### Fullriver FT500 or FT450?

Compared with the FT500, the Fullriver FT450 has 10 Ah less and 50 A less cranking power. The FT500 cranks harder; the FT450 is only a good option if your original battery says 450 A or less. Mind the space: the FT450 measures 250 × 97 × 156 mm.

### How much does the Fullriver FT500 weigh?

The FT500 weighs 14 kg. For reference, the Fullriver FT450 (30 Ah) weighs 10.6 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 FT500

- [All marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [More Fullriver models](https://bateriasonline.es/en/fullriver-batteries)

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