# Exide EX900 · Boat battery 12V 50Ah 800A

![Exide EX900 · Boat battery 12V 50Ah 800A](https://bateriasonline.es/287-home_default/exide-ex900.jpg)

> Exide EX900: 50 Ah boat battery, 800 A (EN), 260×173×206 mm, AGM. Equivalent to Exide EM1000 and Exide EP450. Price on request: ask for a free quote.

**Category:** [Marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries) → [Exide](https://bateriasonline.es/en/exide-batteries)

- **Canonical URL**: https://bateriasonline.es/en/exide-ex900
- **Language**: en
- **Brand**: Exide
- **Reference**: BOL-EXIDE-EX900
- **EAN**: 3661024036603
- **MPN**: EX900
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Exide |
| Range | EXIDE Maxxima |
| Application | Boats |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 50 Ah |
| Cold cranking amps (EN) | 800 A |
| Length | 260 mm |
| Width | 173 mm |
| Height | 206 mm |
| Weight | 17.9 kg |
| Terminal layout | 9 |
| Terminal type | SAE S 3/8&quot side Terminal |

## Quick description

Exide EX900: boat battery with 12 V, 50 Ah and 800 A cold cranking current, measuring 260 × 173 × 206 mm.

## Description

## Who the Exide EX900 is for

The Exide EX900 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 EX900 belongs to the Exide EXIDE Maxxima range. [More Exide batteries](https://bateriasonline.es/en/exide-batteries)

## Inside the EX900: AGM technology

The EX900 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the EX900 can be fitted in the boot or under a seat with no risk of spills.

## Exide EX900 vs EP450 and EM900: differences

The real differences between the EX900 and the closest Exide models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Exide EX900 (this one) | 50 Ah | 800 A | 260 × 173 × 206 | 17.9 kg |
| Exide EP450 | 50 Ah | 750 A | 260 × 173 × 206 | 18.6 kg |
| Exide EM900 | 42 Ah | 700 A | 230 × 173 × 206 | 15.8 kg |

- Exide EP450: the same capacity, 50 A less cranking power, the same dimensions.
- Exide EM900: 8 Ah less, 100 A less cranking power, a different case (230 × 173 × 206 mm).

## Equivalents and alternatives to the Exide EX900

Other AGM batteries that fit the EX900's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EM1000 | AGM | 50 Ah | 800 A | 260 × 173 × 206 |
| Exide EP450 | AGM | 50 Ah | 750 A | 260 × 173 × 206 |

## Part numbers and codes for the Exide EX900

Look for any of these EX900 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | EX900 |
|---|---|
| EAN | 3661024036603 |
| Terminal type | SAE S 3/8&quot side Terminal |
| Not to be confused with | Exide EA900 (90 Ah, 720 A, positive terminal on the right), Exide EC900 (90 Ah, 720 A, positive terminal on the right), Exide ES900 (80 Ah, 540 A, positive terminal on the right) |

## Check this before ordering the Exide EX900

- The EX900 delivers 800 A cold cranking (EN standard); do not go below what your original battery states.
- With 50 Ah, the EX900 replaces an original battery of that capacity or slightly less.
- The EX900 needs 260 × 173 × 206 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Exide EX900

### EX900 or EP450: which one suits me?

Compared with the EX900, the Exide EP450 has 50 A less cranking power. The EX900 cranks harder; the EP450 is only a good option if your original battery says 750 A or less. Both measure 260 × 173 × 206 mm, so they fit the same tray.

### How much does the Exide EX900 weigh?

17.9 kg, with 50 Ah of capacity. For reference, the Exide EP450 (50 Ah) weighs 18.6 kg.

### Which battery is equivalent to the Exide EX900?

Only other AGM batteries with its dimensions and polarity: Exide EM1000 and Exide EP450. Neither an EFB nor a conventional battery replaces the EX900.

### 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 EX900

- [More marine and boat batteries](https://bateriasonline.es/en/marine-boat-batteries)
- [The whole Exide range](https://bateriasonline.es/en/exide-batteries)
- [Exide EM1000](https://bateriasonline.es/en/exide-em1000) · 50 Ah, 800 A, 260×173×206 mm
- [Exide EP450](https://bateriasonline.es/en/exide-ep450) · 50 Ah, 750 A, 260×173×206 mm

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