# Starter Batteries > SLI, EFB and AGM starter batteries for car, motorcycle, truck, van and boat. Varta, Tudor, Exide, Optima. Find yours by plate, model or OEM code. **Category:** [Start](https://baterias.com/gb/beginning) → [Batteries](https://baterias.com/gb/batteries) - **Canonical URL**: https://baterias.com/gb/starter-batteries - **Language**: en-GB ## Description **Starter batteries** (SLI, EFB and AGM) are built for any combustion-engine vehicle: car, motorcycle, truck, bus, van, agricultural and marine. Their essential job is to **deliver the current spike the engine needs when cold** (CCA / EN) and then recharge from the alternator. The difference between technologies is how well they handle the typical start-and-run cycle of each application: **SLI lead-acid** for cars without Start-Stop, **EFB** for basic Start-Stop, and **AGM** for Start-Stop with regenerative braking or vehicles with heavy electrical loads. ## SLI vs EFB vs AGM — when to choose what Classic **SLI** (Starting, Lighting, Ignition) uses thin plates and delivers very high CCA but tolerates few deep cycles. Still valid for cars without Start-Stop and old motorcycles. **EFB** (Enhanced Flooded Battery) is an improved SLI with thicker plates, reinforced polyester separators and more electrolyte. Twice the cycles. Designed for basic Start-Stop. **AGM** (Absorbed Glass Mat) traps the electrolyte in a fibreglass mat. Sealed, tilt-tolerant, spill-proof, three times the cycles of SLI. Mandatory for Start-Stop with regenerative braking. ### Indicative table by vehicle Vehicle Typical capacity Indicative CCA Technology Petrol supermini 40-55 Ah 360-480 A SLI / EFB Basic Start-Stop 60-72 Ah 540-720 A EFB Advanced Start-Stop / SUV 70-95 Ah 680-850 A AGM Road motorcycle 10-18 Ah 120-300 A Motorcycle AGM Industrial van 75-110 Ah 680-900 A EFB / AGM Truck / bus 140-225 Ah 800-1,150 A SHD / AGM ### Compatibility and how to choose the right starter battery Enter your **make, model, engine and year** in our [plate-based battery finder](/gb/battery-finder-by-plate) or use the [comparison tool](/gb/comparator) to confirm the exact technology (SLI/EFB/AGM), capacity (Ah) and CCA your vehicle needs. ### Leading starter brands - [Varta](/gb/batteries-varta) - [Tudor](/gb/batteries-tudor) - [Exide](/gb/batteries-exide) - Optima ## Frequently asked questions about starter batteries ### **How long does a starter battery last?** An SLI typically lasts 3-5 years, an EFB 4-5 years and an AGM 5-7 years, depending on climate, short journeys and Start-Stop use. ### **What does CCA mean and why does it matter?** Cold Cranking Amps (also shown as EN A) measure the battery's ability to deliver the current spike needed to start the engine at low temperatures. ### **Can I fit a higher-capacity (Ah) battery than the original?** Yes, as long as the dimensions and polarity match and the CCA is equal to or higher than the manufacturer's minimum; it won't damage the vehicle's electrical system. ### **How do I know which technology (SLI, EFB or AGM) my car needs?** It depends on whether it has Start-Stop and whether that includes regenerative braking; check the original battery's label or enter your plate in our finder for the exact reference. ### **Is a car battery the same as a motorcycle or truck one?** No. Format, terminal layout and CCA/Ah range all change depending on the engine type and cranking torque each vehicle needs. Catalogue curated by our technical team. **11,045 Trustpilot reviews · 4.5/5**. 24h mainland delivery, free 14-day returns. ## Products in this category | Product | Brand | Price | |---|---|---| | [Car battery Varta E11 12V 74Ah 680A](https://baterias.com/gb/battery-varta-e11-12v-74ah-680a) | VARTA | 68,95 € | | [Car battery Varta E44 12V 77Ah 780A](https://baterias.com/gb/battery-varta-e44-12v-77ah-780a) | VARTA | 78,70 € | | [Start-Stop battery Varta A7 12V 70Ah 760A AGM](https://baterias.com/gb/battery-varta-a7-agm-12v-70ah-760a) | VARTA | 118,15 € | | [Car battery Varta D24 12V 60Ah 540A](https://baterias.com/gb/battery-varta-d24-12v-60ah-540a) | VARTA | 59,10 € | | [Start-Stop battery Varta E39 12V 70Ah 760A AGM](https://baterias.com/gb/battery-varta-e39-agm-12v-70ah-760a) | VARTA | 118,15 € | | [Car battery Varta H3 12V 100Ah 830A](https://baterias.com/gb/battery-varta-h3-12v-100ah-830a) | VARTA | 109,23 € | | [Car battery Varta G7 12V 95Ah 830A](https://baterias.com/gb/battery-varta-g7-12v-95ah-830a) | VARTA | 96,28 € | | [Car battery Varta F17 12V 80Ah 740A](https://baterias.com/gb/battery-varta-f17-12v-80ah-740a) | VARTA | 80,90 € | | [Start-Stop battery Varta A6 12V 80Ah 800A AGM](https://baterias.com/gb/battery-varta-a6-agm-12v-80ah-800a) | VARTA | 146,65 € | | [Car battery Tudor TB740 12V 74Ah 680A](https://baterias.com/gb/battery-tudor-tb740-74ah-680a) | TUDOR | 61,90 € | | [Car battery Varta G8 12V 95Ah 830A](https://baterias.com/gb/battery-varta-g8-12v-95ah-830a) | VARTA | 94,28 € | | [Motorcycle battery Exide GEL12-19 12V 19Ah 170A GEL](https://baterias.com/gb/battery-exide-gel12-19-12v-19ah-170a) | EXIDE | 75,56 € | | [Start-Stop battery Varta N70 12V 70Ah 760A EFB](https://baterias.com/gb/battery-varta-n70-efb-12v-70ah-760a) | VARTA | 110,15 € | | [Car battery Varta G3 12V 95Ah 800A](https://baterias.com/gb/battery-varta-g3-12v-95ah-800a) | VARTA | 94,55 € | | [Start-Stop battery Varta F21 12V 80Ah 800A AGM](https://baterias.com/gb/battery-varta-f21-agm-12v-80ah-800a) | VARTA | 146,65 € | ## 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 --- *baterias.com — Automotive batteries · 2026-08-08*