# OPTIMA BLUE TOP batteries

> OPTIMA Blue Top marine AGM SpiralCell with dual terminals. 38-75 Ah. BT R 3.7, BT S 4.2, BT D34M. 24h delivery.

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- **Language**: en-GB

## Description

**OPTIMA Blue Top batteries**: marine AGM SpiralCell with dual marine terminal and white case. 38-75 Ah. Same as [Yellow Top](/gb/batteries-optima-yellow-top) with marine hardware + aux terminals.

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Marine battery Optima BTDC-5.5 12V 75Ah AGM](https://baterias.com/gb/battery-optima-blue-top-btdc-55-8052-188-12v-75ah) | OPTIMA | 263,05 € |
| [Marine battery Optima BTDC-4.2 12V 55Ah AGM](https://baterias.com/gb/battery-optima-blue-top-btdc-42-8016-253-12v-55ah) | OPTIMA | 216,23 € |
| [Marine battery Optima BTSLI-4.2 12V 50Ah AGM](https://baterias.com/gb/battery-optima-blue-top-btsli-42-8006-252-12v-50ah) | OPTIMA | 180,80 € |
| [Marine battery Optima BTDC-5.0 12V 66Ah AGM](https://baterias.com/gb/battery-optima-blue-top-btdc-50-8027-227-12v-66ah) | OPTIMA | 225,05 € |

## 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 · 2026-06-10*