# Classic Car Batteries > Batteries for SEAT 600, classic Mini, VW Beetle, Citroën 2CV, Mercedes Pagoda, air-cooled Porsche 911. Classic SLI 6V/12V and AGM equivalent. 24h delivery. **Category:** [Start](https://baterias.com/gb/beginning) → [Batteries](https://baterias.com/gb/batteries) → [Starter Batteries](https://baterias.com/gb/starter-batteries) - **Canonical URL**: https://baterias.com/gb/batteries-for-classic-cars - **Language**: en-GB ## Description **Batteries for classic and vintage cars**: SEAT 600/1500, classic Mini, VW Beetle, Citroën 2CV/DS, Renault 4/6/12, vintage Fiat 500/600, MG, Triumph, Jaguar, Mercedes Pagoda, BMW 02 series, air-cooled Porsche 911, Volvo Amazon, pre-2007 Land Rover Defender. Many pre-1960s classics run a **6V** electrical system; later cars already use the 12V standard. To preserve the original look, many classics use black batteries with visible caps (L/classic format) in conventional flooded lead-acid. For real-world use we recommend the **AGM equivalent** in a compatible case — maintenance-free, 4-6 year life, ideal if the car sits idle for long spells in the garage. ## How to choose the right classic-car battery A classic has two enemies: **idleness** (months in the garage sulphate the battery) and **aesthetic sensitivity** (you don't want a modern grey box in the engine bay). There's a fix for both: AGM with a vintage-look case, or for concours authenticity, a classic lead-acid permanently connected to a 12V maintainer. ### Typical capacities Type Capacity CCA Technology Small classic (Mini, 600, 2CV) 40-50 Ah 360-450 A Classic SLI or AGM equivalent Classic saloon (Mercedes, BMW 02) 55-70 Ah 450-600 A SLI / AGM Classic sports / GT 60-75 Ah 540-680 A AGM (vibration) Classic 4x4 (Defender, Range Rover) 75-95 Ah 680-800 A AGM ### Real-use recommendations - Idle 4+ weeks: connect a maintainer. Applies to any battery but critical on classics. - Want to forget about it for 4-6 years: AGM equivalent of the original format. - Concours / authentic restoration: classic black SLI with caps, maintainer mandatory. ### Leading brands - Optima Red Top — AGM SpiralCell, ideal for classics with heavy vibration or trail use. - [Varta Black Dynamic / Classic](/gb/batteries-varta) - [Exide Classic](/gb/batteries-exide) ### Compatibility and how to choose the right equivalent Before buying, check **polarity, voltage (6V or 12V) and dimensions** of the engine bay: many classics use discontinued battery codes that only exist today as a modern equivalent in an L/classic case. Use the [comparator](/gb/comparator) to see capacity (Ah), cold-cranking amps (CCA) and price side by side, or look up your vehicle by plate in our [battery finder by plate](/gb/battery-finder-by-plate) if your classic is already registered. ## Frequently asked questions about classic car batteries ### **Does my classic car run on 6V or 12V?** Cars from before the late 1950s/early 1960s (many early SEAT 600s, pre-1967 Beetles) tend to be 6V; everything later already runs the 12V standard. Check the original data plate before buying. ### **Is an AGM battery compatible with a classic's original engine bay?** Yes, as long as you pick the right case format (L or classic) and match polarity and dimensions; an AGM in a vintage-look case keeps the original appearance while adding years of maintenance-free life. ### **How long does a rarely-driven classic car battery last?** Without a maintainer, conventional flooded lead-acid can sulphate within a few months of idleness; with a 12V maintainer permanently connected, both classic SLI and AGM last noticeably longer. ### **What's the difference between classic SLI and an AGM equivalent?** Classic SLI with caps is faithful to the original and required for authentic concours restoration; the AGM equivalent is sealed, maintenance-free and copes better with vibration and long lay-ups, with a typical 4-6 year life. Catalogue curated by our technical team. **11,057 Trustpilot reviews · 4.5/5**. 24h mainland delivery, free 14-day returns. ## Products in this category | Product | Brand | Price | |---|---|---| | [Car battery Exide EC700 12V 70Ah 640A](https://baterias.com/gb/battery-exide-ec700-12v-70ah-640a) | EXIDE | 84,08 € | | [Car battery Exide EC652 12V 65Ah 540A](https://baterias.com/gb/battery-exide-ec652-12v-65ah-540a) | EXIDE | 77,16 € | | [Car battery Exide EC440 12V 44Ah 360A](https://baterias.com/gb/battery-exide-ec440-12v-44ah-360a) | EXIDE | 73,64 € | | [Car battery Exide EC550 12V 55Ah 460A](https://baterias.com/gb/battery-exide-ec550-12v-55ah-460a) | EXIDE | 68,10 € | | [Car battery Exide EC904 12V 90Ah 680A](https://baterias.com/gb/battery-exide-ec904-12v-90ah-680a) | EXIDE | 103,07 € | | [Car battery Exide EC400 12V 40Ah 320A](https://baterias.com/gb/battery-exide-ec400-12v) | EXIDE | 72,32 € | | [Car battery Exide EC542 12V 54Ah 500A](https://baterias.com/gb/battery-exide-ec542-12v-54ah-500a) | EXIDE | 79,28 € | | [Car battery Exide EC900 12V 90Ah 720A](https://baterias.com/gb/battery-exide-ec900-12v-90ah-720a) | EXIDE | 106,89 € | | [Car battery Exide EC905 12V 90Ah 680A](https://baterias.com/gb/battery-exide-ec905-12v-90ah-680a) | EXIDE | 103,07 € | | [Car battery Exide EC412 12V 41Ah 370A](https://baterias.com/gb/battery-exide-ec412-12v-41ah-370a) | EXIDE | 68,35 € | | [Car battery Exide EC605 12V 60Ah 440A](https://baterias.com/gb/battery-exide-ec605-12v) | EXIDE | 98,75 € | | [Car battery Lucas LC037 12V 36Ah 300A](https://baterias.com/gb/bateria-lucas-classic-36ah-lc037) | LUCAS | 114,55 € | ## 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 --- *baterias.com — Automotive batteries · 2026-08-09*