# Fullriver FT825-78 · Boat battery 12V 65Ah 825A

![Fullriver FT825-78 · Boat battery 12V 65Ah 825A](https://bateriasonline.es/2563-home_default/fullriver-ft825-78.jpg)

> Fullriver FT825-78: 65 Ah boat battery, 825 A (EN), 261×172×211 mm, AGM. Equivalent to Fullriver FT825-34.

**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-ft825-78
- **Language**: en
- **Brand**: Fullriver
- **Reference**: BOL-FULLRIVER-FT825-78
- **MPN**: FT825-78
- **Price**: 321,39 € (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 | 211 mm |
| Weight | 21.1 kg |
| Terminal type | M8 + TP29 + FR45 |

## Quick description

Fullriver FT825-78: boat battery with 12 V, 65 Ah and 825 A cold cranking current, measuring 261 × 172 × 211 mm.

## Description

## The Fullriver FT825-78 at a glance

The Fullriver FT825-78 is a battery for boats: engine starting or on-board service, depending on its design, with resistance to damp and hull vibration. With 65 Ah, the FT825-78 suits boats that had a battery of that capacity.
The FT825-78 belongs to the Fullriver Full Throttle Series range. [More Fullriver batteries](https://bateriasonline.es/en/fullriver-batteries)

## Equivalents and alternatives to the Fullriver FT825-78

As the FT825-78 is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fullriver FT825-34 | AGM | 65 Ah | 825 A | 261 × 172 × 208 |

## Fullriver FT825-78 vs DC70-12 and FFD80-12

What sets the FT825-78 apart from its neighbours in the Fullriver range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fullriver FT825-78 (this one) | 65 Ah | 825 A | 261 × 172 × 211 | 21.1 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).

## AGM technology in the FT825-78

The FT825-78 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FT825-78 can be fitted in the boot or under a seat with no risk of spills.

## What to look at before buying the FT825-78

- The FT825-78 needs 261 × 172 × 211 mm of space: measure it with the hold-down clamp in place.
- With 65 Ah, the FT825-78 replaces an original battery of that capacity or slightly less.
- Cold cranking: 825 A (EN), equal to or higher than the original.

## Fullriver FT825-78 codes and part numbers

Look for any of these FT825-78 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FT825-78 |
|---|---|
| Terminal type | M8 + TP29 + FR45 |

## Frequently asked questions about the Fullriver FT825-78

### Fullriver FT825-78 or DC70-12?

Compared with the FT825-78, the Fullriver DC70-12 has 5 Ah more and 375 A less cranking power. The FT825-78 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 FT825-78 weigh?

The FT825-78 weighs 21.1 kg. For reference, the Fullriver DC70-12 (70 Ah) weighs 24 kg.

### Which battery is equivalent to the Fullriver FT825-78?

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

### Can the Fullriver FT825-78 be used for starting and service at the same time?

Only if it is dual purpose. A starter battery is not built for deep discharge, and a service battery does not deliver the current peak the engine asks for.

## Other options if you are unsure about the FT825-78

- [More marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [The whole Fullriver range](https://bateriasonline.es/en/fullriver-batteries)
- [Fullriver FT750-25](https://bateriasonline.es/en/fullriver-ft750-25) · 64 Ah, 750 A, 240×174×220 mm
- [Fullriver FT750-35](https://bateriasonline.es/en/fullriver-ft750-35) · 64 Ah, 750 A, 240×174×220 mm

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