# EXIDE MARINA DUAL ET

> Exide Marina Dual ET AGM dual purpose marine battery: sealed, maintenance-free, 60-115 Ah and up to 850 A CCA. ET550 and ET650, 24h delivery.

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## Description

**Exide Marina Dual ET batteries** are the **AGM** dual purpose series of the Marina Dual family: a sealed, maintenance-free **marine battery** that cranks the engine and powers your on-board loads. With capacities from 60 to 115 Ah and cranking currents of 680 to 850 A (CCA), it brings the most advanced technology in Exide's marine range.
It is the **boat battery** to pick if you want to forget about maintenance: the AGM construction is spill-proof, copes better with hull vibration and accepts deeper discharges than a flooded battery, ideal for boats running plenty of electronics.

## Exide Marina Dual ET: maintenance-free AGM dual purpose marine battery

The **Exide Marina Dual ET** series applies **AGM** (Absorbent Glass Mat) technology to marine dual purpose duty: the electrolyte is absorbed in glass-fibre separators, so the battery is sealed, spills no acid even when heeled over, and withstands vibration and cycling better than a flooded marine battery. With 680-850 A of cranking current (CCA), it delivers confident starts even after days at anchor.

### Models in the Marina Dual ET series

- **Exide ET550** — 80 Ah, 800 A (CCA): speedboats and yachts with fishfinder, GPS, radio and fridge.
- **Exide ET650** — 95 Ah, 850 A (CCA): boats with higher on-board consumption or more demanding engines.

### When to choose AGM over a flooded marine battery

Choose the ET if the battery sits in a closed or hard-to-reach compartment, if you sail in chop that punishes the battery tray, or if your electronics cycle the battery often. Compare sizes, capacity and price of the ET models in our [battery comparator](/gb/comparator).

## Frequently asked questions about the Exide Marina Dual ET

### **What is the advantage of an AGM battery on a boat?**

AGM batteries are sealed and maintenance-free: no topping up, no acid spills under heel or swell, and better vibration resistance, which makes them safer in the enclosed compartments of a boat.

### **How does the Marina Dual ET differ from the EP or ER?**

The ET is the sealed AGM series of the Marina Dual family, while EP and ER use flooded lead-acid (FLA). The ET takes deeper discharges with zero maintenance; the flooded ranges offer more maximum capacity (up to 140 Ah) at a lower price.

### **Can I mount an ET battery tilted or in a closed compartment?**

Yes. Being sealed with gas recombination, an AGM like the ET can work tilted and in poorly ventilated spaces where a flooded battery would not be advisable. Only upside-down mounting should be avoided.

Catalogue curated by our technical team. **10,976 Trustpilot reviews · 4.4/5**. 24h mainland delivery, free 14-day returns.

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Marine battery Exide ET650 12V 100Ah](https://baterias.com/gb/battery-exide-et650-12v-100ah-800a) | EXIDE | 155,56 € |
| [Marine battery Exide ET950 12V 135Ah](https://baterias.com/gb/battery-exide-et950-12v-135ah-700a) | EXIDE | 208,28 € |
| [Marine battery Exide ET550 12V 80Ah](https://baterias.com/gb/battery-exide-et550-12v-80ah-600a) | EXIDE | 178,97 € |
| [Marine battery Exide ET1300 12V 180Ah](https://baterias.com/gb/battery-exide-et1300-12v-180ah-900a) | EXIDE | 278,80 € |
| [Marine battery Exide ET1600 12V 230Ah](https://baterias.com/gb/battery-exide-et1600-12v-230ah-1100a) | EXIDE | 339,65 € |

## 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 · 2026-08-04*