# OPTIMA RED TOP batteries

> OPTIMA Red Top SpiralCell AGM pure cranking restomod, V8, hot-rod. 38-75 Ah, 730-1000 A. RT R 3.7, RT S 4.2, RT 34. 24h delivery.

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## Description

**OPTIMA Red Top batteries**: pure-cranking AGM SpiralCell, 38-75 Ah, CCA 730-1000 A. For restomods, hot-rods, classic V8 cars and tuning without heavy auxiliary loads.

## OPTIMA Red Top — pure cranking

Cranking-only SpiralCell variant. Very high CCA peak, not suitable for deep cycle. For American classic restomods, European V8 and applications where only engine cranking is needed.
Code Ah CCA Application
RT R 3.7 44 730 Restomod compact
RT S 4.2 50 815 European V8, BMW M
RT R 5.0 50 815 Hot-rod
RT 34 55 875 Classic American pick-up

For HiFi audio, winch or RV use [Yellow Top](/gb/batteries-optima-yellow-top); for boats use [Blue Top](/gb/batteries-optima-blue-top).
OPTIMA Red Top catalogue curated by our technical team. **10,540 Trustpilot reviews · 4.4/5**. 24h delivery, 14-day returns.

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Car battery Optima RTC-4.2 12V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rtc-42-8001-287-12v-50ah) | OPTIMA | 185,15 € |
| [Car battery Optima RTS-4.2 12V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rts-42-8002-250-12v-50ah) | OPTIMA | 186,70 € |
| [Car battery Optima RTU-4.2 12V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rtu-42-8004-250-12v-50ah) | OPTIMA | 185,15 € |
| [Car battery Optima RTS-2.1 6V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rts-21-8010-355-12v-50ah) | OPTIMA | 162,96 € |
| [Car battery Optima RTU-3.7 12V 44Ah 730A AGM](https://baterias.com/gb/battery-optima-red-top-rtu-37-8022-255-12v-44ah) | OPTIMA | 186,65 € |
| [Car battery Optima RTR-3.7 12V 44Ah 730A AGM](https://baterias.com/gb/battery-optima-red-top-rtr-37-8035-255-12v-44ah) | OPTIMA | 191,20 € |
| [Car battery Optima RTR-4.2 12V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rtr-42-8003-251-12v-50ah) | OPTIMA | 209,20 € |
| [Car battery Optima RTF-4.2 12V 50Ah 815A AGM](https://baterias.com/gb/battery-optima-red-top-rtf-42-8078-209-12v-50ah) | OPTIMA | 197,00 € |
| [Car battery Optima RTS-3.7 12V 44Ah 730A AGM](https://baterias.com/gb/battery-optima-red-top-rts-37-8020-255-12v-44ah) | OPTIMA | 190,15 € |

## 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 · 2026-07-06*