# Fullriver FT825-34 · Boat battery 12V 65Ah 825A

![Fullriver FT825-34 · Boat battery 12V 65Ah 825A](https://bateriasonline.es/2555-home_default/fullriver-ft825-34.jpg)

> Fullriver FT825-34: 65 Ah boat battery, 825 A (EN), 261×172×208 mm, AGM. Equivalent to Fullriver FT825-78.

**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-ft825-34
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-FT825-34
- **MPN**: FT825-34
- **Price**: 302,77 € (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 | 65 Ah |
| Cold cranking amps (EN) | 825 A |
| Length | 261 mm |
| Width | 172 mm |
| Height | 208 mm |
| Weight | 20.9 kg |
| Terminal type | M8 + TP28 (SAE) |

## Quick description

Fullriver FT825-34: boat battery with 12 V, 65 Ah and 825 A cold cranking current, measuring 261 × 172 × 208 mm.

## Description

## Where the Fullriver FT825-34 fits

The Fullriver FT825-34 is made for marine use. Fit the FT825-34 securely on board and away from bilge water.
The FT825-34 belongs to the Fullriver Full Throttle Series range. [More Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## Inside the FT825-34: AGM technology

Inside, the FT825-34 has glass fibre separators (AGM) that hold the electrolyte. The FT825-34 needs a charger with an AGM mode that does not exceed 14.7 V.

## Fullriver FT825-34 vs DC70-12 and FFD80-12: which one to choose?

The real differences between the FT825-34 and the closest Fullriver models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver FT825-34 (this one) | 65 Ah | 825 A | 261 × 172 × 208 | 20.9 kg |
| Fullriver DC70-12 | 70 Ah | 450 A | 260 × 169 × 215 | 24 kg |
| Fullriver FFD80-12 | 80 Ah | 530 A | 260 × 169 × 215 | 23.1 kg |

- Fullriver DC70-12: 5 Ah more, 375 A less cranking power, a different case (260 × 169 × 215 mm).
- Fullriver FFD80-12: 15 Ah more, 295 A less cranking power, a different case (260 × 169 × 215 mm).

## Equivalents and alternatives to the Fullriver FT825-34

Other AGM batteries that fit the FT825-34's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fullriver FT825-78 | AGM | 65 Ah | 825 A | 261 × 172 × 211 |

## Part numbers and codes for the Fullriver FT825-34

This is how the Fullriver FT825-34 appears on the label and in parts catalogues:

| Commercial reference | FT825-34 |
|---|---|
| Terminal type | M8 + TP28 (SAE) |

## Before ordering the FT825-34, check this

- The FT825-34 delivers 825 A cold cranking (EN standard); do not go below what your original battery states.
- Your current battery should say about 65 Ah; a little more is also fine.
- The FT825-34 needs 261 × 172 × 208 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fullriver FT825-34

### FT825-34 or DC70-12: which one suits me?

Compared with the FT825-34, the Fullriver DC70-12 has 5 Ah more and 375 A less cranking power. The FT825-34 cranks harder; the DC70-12 is only a good option if your original battery says 450 A or less. Mind the space: the DC70-12 measures 260 × 169 × 215 mm.

### How much does the Fullriver FT825-34 weigh?

20.9 kg, with 65 Ah of capacity. For reference, the Fullriver DC70-12 (70 Ah) weighs 24 kg.

### Which battery is equivalent to the Fullriver FT825-34?

Only other AGM batteries with its dimensions and polarity: Fullriver FT825-78. Neither an EFB nor a conventional battery replaces the FT825-34.

### 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 FT825-34

- [Other marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [More Fullriver models](https://bateriasonline.es/en/fullriver-batteries)
- [Fullriver FT825-78](https://bateriasonline.es/en/fullriver-ft825-78) · 65 Ah, 825 A, 261×172×211 mm

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