# Marine battery Fullriver FT500 12V 40Ah 500A AGM

![Marine battery Fullriver FT500 12V 40Ah 500A AGM](https://baterias.com/3159-home_default/battery-fullriver-ft500-12v-40ah-500a.jpg)

> Fullriver FT500 marine battery 12V 40Ah 500A AGM. Full Throttle Series range. Dimensions 250×97×206 mm. Cranking and house duties.

**Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [FULLRIVER](https://baterias.com/gb/fullriver)

- **Canonical URL**: https://baterias.com/gb/battery-fullriver-ft500-12v-40ah-500a
- **Language**: en-GB
- **Brand**: FULLRIVER
- **Reference**: BCOM-FULLRIVER-FT500
- **MPN**: FT500
- **Price**: 212,20 €
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | FULLRIVER |
| Reference | FT500 |
| Model | Full Throttle Series |
| Voltage (V) | 12 V |
| Largo | 250 cm |
| Ancho | 97 cm |
| Alto | 206 cm |
| Peso | 14 kg |
| Tecnología | AGM |
| Terminal type | M6 M |
| Cold cranking amps (EN) | 500 |
| Capacity (C20) | 40 |
| Case type | - |

## Quick description

**Fullriver FT500 12V 40Ah 500A** is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea.

### Why this marine battery?

- **Marine design** built for boat swell and vibration
- **Dual function** starts the engine and powers onboard services
- **Sealed and safe** maintenance-free even when the boat rolls

🔌 Voltage
12 V

⚡ Capacity
40 Ah C20

🔋 Cold cranking
500 A EN-1

📏 Dimensions
250×97×206 mm

⚙️ Technology
AGM

⚖️ Weight
14 kg

🏷️ Model
Full Throttle Series

## Description

## Marine battery Fullriver FT500 Full Throttle Series 40Ah 500A 12V

12*V* Voltage
40*Ah* Capacity
500*A* Cold cranking
14*kg* Weight

The **Fullriver FT500** with AGM technology is a marine battery with **40 Ah** and **500 A** of cold cranking current (EN) for motor and sailing boats, both for engine starting and onboard services. Its 250 × 97 × 206 mm make it the exact replacement for the 40 Ah battery fitted as standard to many boats.
- Resistant to humidity and salt air.
- Sealed: no spills or gases in the locker.
- Ready for starting outboard and inboard engines.
- AGM: faster recharging and better cycle resistance than a conventional battery.

### What the Fullriver FT500 is for

With 40 Ah, the Fullriver FT500 covers motor and sailing boats, both for engine starting and onboard services. At the end of the season, charge it fully before winter storage. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 14 kg and M6M terminals.

### The Fullriver FT500: Full Throttle Series range and AGM technology

Within the Fullriver catalogue, the **Full Throttle Series** series groups the references designed for this use. The FT500 is the 40 Ah model of that family, with the same performance as its siblings in other sizes.
In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.

### Will it fit your current battery tray?

It has external dimensions of 250 × 97 × 206 mm and weighs 14 kg. It uses M6M terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

### Why choose Fullriver batteries

Fullriver specialises in deep-cycle AGM batteries for mobility, marine, solar and traction. Its DC and HC series are known for their tolerance to deep discharge and long cycle life. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

### Usage and maintenance tips

Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.

### Official warranty

The Fullriver FT500 comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

### Delivery times and returns

Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.

## Frequently asked questions

### Is the Fullriver FT500 an AGM battery and what are the benefits of AGM?

Yes. The FT500 from Fullriver uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for boats with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.

### How is the Fullriver FT500 battery installed in the vehicle?

In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### What is the service life of the FT500 model?

Expected lifespan of the Fullriver FT500 is 5 to 8 years in mild-climate boat use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

### What are the dimensions of the Fullriver FT500 battery?

Dimensions (length × width × height) are 250×97×206 mm — also written as 250x97x206 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### Does this battery fit my boat?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FT500 typically fits a wide range of European vehicles thanks to its standard DIN case format.

### Which batteries are equivalent to the Fullriver FT500?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop boats. See the "Equivalents" section to view recommended options at the same performance level.


## Reviews

- **Average rating**: 4.76 / 5 (30 reviews)

## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-09-30*