# Start-Stop batteries (AGM and EFB) > Over 110 Start-Stop EFB and AGM car batteries from Varta, Fulmen, Exide, Tudor and Deta, such as the Varta A7 (formerly E39). Final price with VAT included. **Category:** [Beginning](https://bateriasonline.es/en/) → [Battery types: starter, deep cycle, traction and stationary](https://bateriasonline.es/en/batteries) → [Starter batteries](https://bateriasonline.es/en/starter-batteries) - **Canonical URL**: https://bateriasonline.es/en/start-stop-batteries-agm-efb - **Language**: en ## Description If your car has Start-Stop, fit the same technology it came with, EFB or AGM, and buy it online with the shipping cost shown upfront. **Most searched:** Start-Stop models with the most searches: check whether your car uses EFB or AGM and go straight to the product page. - [Varta A6 AGM 80Ah 800A](https://bateriasonline.es/en/varta-a6) - [Varta A7 AGM 70Ah 760A](https://bateriasonline.es/en/varta-a7) - [Exide EL700 EFB 70Ah 760A](https://bateriasonline.es/en/exide-el700) - [Tudor TK720 AGM 72Ah 760A](https://bateriasonline.es/en/tudor-tk720) - [Varta N70 EFB 70Ah 760A](https://bateriasonline.es/en/varta-n70) - [Varta N60 EFB 60Ah 640A](https://bateriasonline.es/en/varta-n60) - [Tudor TK820 AGM 82Ah 800A](https://bateriasonline.es/en/tudor-tk820) - [Exide EL600 EFB 60Ah 640A](https://bateriasonline.es/en/exide-el600) A car that switches off its engine at every stop asks its battery for dozens of restarts per trip while also feeding lights, climate and infotainment. Standard flooded designs cannot cope with that rhythm, which is why stop-start vehicles use EFB or AGM. Here you can compare both technologies by capacity, cranking current and box format. ## EFB or AGM: identify what your car needs The original battery tells you the answer. Look for the letters **EFB** (Enhanced Flooded Battery) or **AGM** (Absorbent Glass Mat) on the label. - **EFB**: improved flooded design with a carbon additive and reinforced plates. It suits entry-level stop-start systems without heavy energy recovery. - **AGM**: electrolyte absorbed in glass fibre, sealed and valve-regulated. It handles deep partial discharges and regenerative braking, and is usual in premium cars and vehicles with many consumers. You may replace EFB with AGM to gain margin. Never replace AGM with EFB or flooded: the charging strategy and stop-start function expect AGM behaviour, and the battery would fail early. ## Why registration matters Most stop-start vehicles have an intelligent battery sensor on the negative terminal. After a replacement, the control unit should be told that a new battery is fitted, and of what type and capacity. Without that step the alternator may keep charging as if the old, worn battery were still in place, and the stop-start function may stay disabled. ## Signs of a tired stop-start battery The engine stops shutting off at traffic lights, the dashboard shows a message about battery level, or the car cranks more slowly on cold mornings. These usually appear before a complete failure. If your car also carries a small secondary battery for back-up functions, look in [auxiliary batteries](https://bateriasonline.es/en/auxiliary-backup-batteries). For cars without stop-start, the right section is [car batteries](https://bateriasonline.es/en/car-batteries); the full family is under [starter batteries](https://bateriasonline.es/en/starter-batteries). The [VARTA](https://bateriasonline.es/en/varta-batteries) range includes both EFB and AGM. ## Frequently asked questions ### Can I fit a normal battery to a stop-start car? It will start the car, but the repeated discharges wear it out in a short time and the system may switch stop-start off. Use the same technology as the original or AGM. ### Does an AGM battery need a special charger? A modern smart charger with an AGM mode is recommended, since AGM is sensitive to overcharging voltage. ## Choose by brand The same start-Stop batteries (AGM and EFB), filtered by manufacturer. Each brand has its own page with all its references and a buying guide. - [Fulmen car batteries](https://bateriasonline.es/en/fulmen-car-batteries) (24) - [Exide car batteries](https://bateriasonline.es/en/exide-car-batteries) (19) - [Tudor car batteries](https://bateriasonline.es/en/tudor-car-batteries) (19) - [Varta car batteries](https://bateriasonline.es/en/varta-car-batteries) (19) - [Deta car batteries](https://bateriasonline.es/en/deta-car-batteries) (17) - [Kronobat car batteries](https://bateriasonline.es/en/kronobat-car-batteries) (8) To find out whether your Start-Stop car takes an EFB or an AGM battery, see our [car battery by model](https://bateriasonline.es/en/car-battery-by-model) guide: each model’s table shows it engine by engine. **Related guides:** help you compare and pick the right battery. - [Varta A7 (formerly E39): what changed and equivalents](https://bateriasonline.es/en/varta-a7-e39-agm-battery-equivalents) - [Varta, Bosch, Exide and Tudor car battery equivalents table](https://bateriasonline.es/en/varta-bosch-exide-tudor-car-battery-equivalents) ## Products in this category | Product | Brand | Price | |---|---|---| | [Exide EL600 · Start-Stop battery 12V 60Ah 640A](https://bateriasonline.es/en/exide-el600) | Exide | 74,99 € | | [Varta A7 (formerly E39) · Start-Stop battery 12V 70Ah 760A](https://bateriasonline.es/en/varta-a7) | Varta | 122,95 € | | [Varta A6 (formerly F21) · Start-Stop battery 12V 80Ah 800A](https://bateriasonline.es/en/varta-a6) | Varta | 146,62 € | | [Tudor TK720 · Start-Stop battery 12V 72Ah 760A](https://bateriasonline.es/en/tudor-tk720) | Tudor | 106,10 € | | [Exide EL800 · Start-Stop battery 12V 80Ah 800A](https://bateriasonline.es/en/exide-el800) | Exide | 87,78 € | | [Varta E46 · Start-Stop battery 12V 75Ah 730A](https://bateriasonline.es/en/varta-e46) | Varta | 116,98 € | | [Varta A8 (formerly D52) · Start-Stop battery 12V 60Ah 680A](https://bateriasonline.es/en/varta-a8) | Varta | 104,97 € | | [Varta N85 · Start-Stop battery 12V 85Ah 800A](https://bateriasonline.es/en/varta-n85) | Varta | 124,43 € | | [Tudor TL550 · Start-Stop battery 12V 55Ah 540A](https://bateriasonline.es/en/tudor-tl550) | Tudor | 75,13 € | | [Tudor TL600 · Start-Stop battery 12V 60Ah 640A](https://bateriasonline.es/en/tudor-tl600) | Tudor | 82,73 € | | [Exide EK508 · Start-Stop battery 12V 50Ah 800A](https://bateriasonline.es/en/exide-ek508) | Exide | 137,41 € | | [Exide EL550 · Start-Stop battery 12V 55Ah 540A](https://bateriasonline.es/en/exide-el550) | Exide | 93,90 € | | [Exide EL604 · Start-Stop battery 12V 60Ah 520A](https://bateriasonline.es/en/exide-el604) | Exide | 110,56 € | | [Exide EL605 · Start-Stop battery 12V 60Ah 520A](https://bateriasonline.es/en/exide-el605) | Exide | 110,46 € | | [Exide EL652 · Start-Stop battery 12V 65Ah 650A](https://bateriasonline.es/en/exide-el652) | Exide | 106,84 € | --- *bateriasonline.es — Batteries and accessories · 2026-11-10*