# EXIDE MARINA DUAL ER

> Exide Marina Dual ER dual purpose marine battery: engine starting plus house power, 80-140 Ah. ER450, ER550 and ER650 with 24h delivery.

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## Description

**Exide Marina Dual ER batteries** (Endurance Range) are the core **dual purpose marine battery** line from Exide in flooded lead-acid (FLA) technology: one battery that starts the engine and runs your on-board loads. With capacities from 80 to 140 Ah, it is the balanced all-round **marine battery** of the Marina Dual family.
It suits regular boaters who want a dependable **boat battery** at a fair price: speedboats, sailing yachts and leisure fishing boats with fishfinder, lights and radio, without fitting separate starting and house batteries.

## Exide Marina Dual ER: the all-round dual purpose marine battery

The **Exide Marina Dual ER** (Endurance Range) series is the heart of Exide's **dual purpose battery** family: marine-grade flooded lead-acid (FLA) construction that withstands vibration and moderate discharges, handling both engine cranking and the continuous draw of on-board equipment. A proven balance of robustness, capacity and price.

### Models in the Marina Dual ER series

- **Exide ER450** — 80 Ah, for small craft and outboard motors with basic equipment.
- **Exide ER550** — 100 Ah, the middle ground for speedboats and yachts with fishfinder, GPS and VHF radio.
- **Exide ER650** — 140 Ah, the biggest reserve: long fishing days or nights at anchor with higher consumption.

### How to choose your ER starting and house battery

Estimate your daily on-board consumption and pick the model whose amp-hours (Ah) leave headroom without deep discharges; the more electronics, the more capacity. Compare the three models by size, capacity and price in our [battery comparator](/gb/comparator).

## Frequently asked questions about the Exide Marina Dual ER

### **What does dual purpose mean on the Marina Dual ER?**

It combines both on-board jobs: it delivers the burst of current needed to crank the engine and also withstands the prolonged discharge of lights, fishfinder or radio, which a pure starter battery does not tolerate well.

### **What is the difference between the Exide Marina Dual ER and the EZ?**

The ER (Endurance Range) is the mid-to-high flooded dual purpose range, with capacities up to 140 Ah; the EZ is the entry-level series, up to 115 Ah, aimed at more occasional boating.

### **Does an ER battery need maintenance?**

As a flooded lead-acid battery it deserves a start-of-season check: clean terminals, a full charge and, where the design allows, the electrolyte level. A maintenance charger over winter extends its service life.

Catalogue curated by our technical team. **11,044 Trustpilot reviews · 4.5/5**. 24h mainland delivery, free 14-day returns.

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Marine battery Exide ER550 12V 115Ah 760A](https://baterias.com/gb/battery-exide-er570-12v-120ah-760a) | EXIDE | 122,65 € |
| [Marine battery Exide ER350 12V 80Ah 570A](https://baterias.com/gb/battery-exide-er350-12v-80ah-510a) | EXIDE | 84,50 € |
| [Marine battery Exide ER450 12V 95Ah 720A](https://baterias.com/gb/battery-exide-er450-12v-95ah-650a) | EXIDE | 88,85 € |
| [Marine battery Exide ER660 12V 140Ah 750A](https://baterias.com/gb/battery-exide-er660-12v-140ah-750a) | EXIDE | 237,44 € |
| [Marine battery Exide ER570 12V 120Ah 760A](https://baterias.com/gb/battery-exide-er570-12v-120ah-760a) | EXIDE | 122,65 € |

## 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 · 2026-08-08*