# Fullriver FT438-U1 · Boat battery 12V 35Ah 438A

![Fullriver FT438-U1 · Boat battery 12V 35Ah 438A](https://bateriasonline.es/2190-home_default/fullriver-ft438-u1.jpg)

> Fullriver FT438-U1: 35 Ah boat battery, 438 A (EN), 196×131×192 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-ft438-u1
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-FT438-U1
- **MPN**: FT438-U1
- **Price**: 371,37 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fullriver |
| Range | Full Throttle Series |
| Application | Boats |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 35 Ah |
| Cold cranking amps (EN) | 438 A |
| Length | 196 mm |
| Width | 131 mm |
| Height | 192 mm |
| Weight | 11.3 kg |
| Terminal type | M6 + TP26 (SAE) |

## Quick description

The Fullriver FT438-U1 is a boat battery with 12 V, 35 Ah and 438 A cold cranking current, measuring 196 × 131 × 192 mm.

## Description

## Where the Fullriver FT438-U1 fits

The Fullriver FT438-U1 is a battery for boats: engine starting or on-board service, depending on its design, with resistance to damp and hull vibration. With 35 Ah, the FT438-U1 suits boats that had a battery of that capacity.
The FT438-U1 belongs to the Fullriver Full Throttle Series range. [The full range of Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## Equivalents and alternatives to the Fullriver FT438-U1

We have no other battery with exactly the dimensions and polarity of the FT438-U1. Browse the rest of our [marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries) to compare close options.

## Fullriver FT438-U1 vs FFD35-12, DC35-12B and DC35-12

How the FT438-U1 compares with Fullriver batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver FT438-U1 (this one) | 35 Ah | 438 A | 196 × 131 × 192 | 11.3 kg |
| Fullriver FFD35-12 | 35 Ah | 225 A | 196 × 131 × 167 | 9.9 kg |
| Fullriver DC35-12B | 35 Ah | – | 196 × 131 × 180 | 11.5 kg |
| Fullriver DC35-12 | 35 Ah | 190 A | 196 × 131 × 167 | 11.5 kg |

- Fullriver FFD35-12: the same capacity, 213 A less cranking power, a different case (196 × 131 × 167 mm).
- Fullriver DC35-12B: the same capacity, a different height (180 mm instead of 192 mm). It is the option if your battery tray cannot take the 192 mm height of the FT438-U1.
- Fullriver DC35-12: the same capacity, 248 A less cranking power, a different case (196 × 131 × 167 mm).

## AGM technology in the FT438-U1

The FT438-U1 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FT438-U1 can be fitted in the boot or under a seat with no risk of spills.

## What to look at before buying the FT438-U1

- The FT438-U1 needs 196 × 131 × 192 mm of space: measure it with the hold-down clamp in place.
- Capacity of the FT438-U1: 35 Ah; the same as your current battery or slightly more is fine.
- Cold cranking: 438 A (EN), equal to or higher than the original.

## Part numbers and codes for the Fullriver FT438-U1

Look for any of these FT438-U1 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FT438-U1 |
|---|---|
| Terminal type | M6 + TP26 (SAE) |

## Frequently asked questions about the Fullriver FT438-U1

### FT438-U1 or FFD35-12: which one suits me?

Compared with the FT438-U1, the Fullriver FFD35-12 has 213 A less cranking power. The FT438-U1 cranks harder; the FFD35-12 is only a good option if your original battery says 225 A or less. Mind the space: the FFD35-12 measures 196 × 131 × 167 mm.

### Fullriver FT438-U1 or DC35-12B: what changes?

Mainly the height: the FT438-U1 is 192 mm tall and the Fullriver DC35-12B 180 mm, with the same length and width and 35 Ah against 35 Ah. Before choosing between the FT438-U1 and the DC35-12B, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Fullriver FT438-U1 weigh?

11.3 kg, with 35 Ah of capacity. For reference, the Fullriver FFD35-12 (35 Ah) weighs 9.9 kg.

### Which charger does the Fullriver FT438-U1 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.

## Other options if you are unsure about the FT438-U1

- [Other marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [Full Fullriver catalogue](https://bateriasonline.es/en/fullriver-batteries)

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