Start-Stop Car Batteries

At a glance

• Technologies: EFB for basic Start-Stop and AGM for Start-Stop with regenerative braking.
• Brands: Varta (Blue Dynamic EFB and Silver Dynamic AGM) and Tudor (EFB and AGM Microhybrid).
• Capacities: 50 to 106 Ah, all 12 V.
• Shipping: 24 hours to Spain and Portugal, with a 14-hour express service. We also ship to France, Italy, Germany, Belgium and the Netherlands.
• Free returns and help choosing by email.

EFB or AGM: which one does your car need?

The technology is printed on the label of your current battery: look for "EFB" or "AGM".

How to choose a Start-Stop battery

1. Technology: the same as the original or better. EFB → AGM is fine; AGM → EFB never, because an EFB cannot cope with the cycling of a car designed for AGM and the Start-Stop eventually stops working.
2. Capacity (Ah) and cold cranking amps (A, EN standard): equal or higher.
3. Dimensions and terminals: for example, the Varta E39 / A7 measures 278 × 175 × 190 mm (H6/LN3 case). Also check which side the positive terminal is on.
4. BMS registration: many cars need the new battery to be registered with a diagnostic tool.

Best-selling Start-Stop batteries

• Varta E39 / A7: 70 Ah and 760 A, AGM. Our top seller.
• Varta G14 / A5: 95 Ah and 850 A, AGM.
• Varta N60: 60 Ah and 640 A, EFB.
• Varta D52 / A8: 60 Ah and 680 A, AGM.
• Tudor TK960: 96 Ah and 850 A, AGM.
• Tudor TK820: 82 Ah and 800 A, AGM.
• Varta N65: 65 Ah and 650 A, EFB.

More sections: all car batteries, auxiliary batteries (many Start-Stop cars also have one) and battery chargers.

Frequently asked questions

Can I fit an EFB or a conventional battery if my car came with AGM?

No. A car fitted with AGM at the factory needs another AGM. The other way round is fine: if it has an EFB, you can upgrade to AGM.

Does the new battery need to be registered?

On many Start-Stop cars, yes. The battery management system (BMS) adjusts charging to the battery it has on record; if the new one is not registered, it may be charged incorrectly.

When will my order arrive?

Orders placed before the cut-off time leave the same working day. Delivery to Spain and Portugal takes 24 hours, and there is a 14-hour express service. You will see the exact delivery time when choosing shipping, before you pay.

How do I know which one I need?

Write to us via our contact page with your car's make, model and year, or a photo of the battery label, and we will tell you. Returns are free.