# Fulmen FL604 · Start-Stop battery 12V 60Ah 520A ![Fulmen FL604 · Start-Stop battery 12V 60Ah 520A](https://bateriasonline.es/2719-home_default/fulmen-fl604.jpg) > Fulmen FL604: 60 Ah Start-Stop battery, 520 A (EN), 230×173×222 mm, positive terminal on the right, D23 case, EFB. Equivalent to Exide EL604 and Tudor TL604. **Category:** [Start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb) → [Fulmen](https://bateriasonline.es/en/fulmen-batteries) - **Canonical URL**: https://bateriasonline.es/en/fulmen-fl604 - **Language**: en - **Brand**: Fulmen - **Reference**: BOL-FULMEN-FL604 - **EAN**: 3661024046305 - **MPN**: FL604 - **Last updated**: 2026-10-27 ## Technical specifications | Feature | Value | |---|---| | Brand | Fulmen | | Range | FULMEN EFB | | Application | Start-Stop cars | | Technology | EFB | | Voltage | 12 V | | Capacity | 60 Ah | | Cold cranking amps (EN) | 520 A | | Length | 230 mm | | Width | 173 mm | | Height | 222 mm | | Weight | 15.8 kg | | Polarity | Positive terminal on the right | | Case size | D23 (232 × 173 × 225 mm) | ## Quick description Fulmen FL604: Start-Stop battery (EFB) with 12 V, 60 Ah and 520 A cold cranking current, case size D23 (230 × 173 × 222 mm), with the positive terminal on the right. With the positive terminal on the left, the exact counterpart is the Fulmen FL605. ## Description ## Where the Fulmen FL604 fits The Fulmen FL604 is a battery for cars with Start-Stop: it withstands many more starting and partial-discharge cycles than a conventional battery and powers the electronics every time the engine stops at the lights. In a Start-Stop car, the FL604 keeps the radio, climate control and lights running with the engine off without losing capacity. At 60 Ah it covers petrol compacts and small diesels, the best-selling format in Europe. The FL604 belongs to the Fulmen FULMEN EFB range. [See all Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries) ## Part numbers and codes for the Fulmen FL604 Look for any of these FL604 codes on your current battery or in the manufacturer's catalogue: | Commercial reference | FL604 | |---|---| | EAN | 3661024046305 | | Case size (EN) | D23 | | Not to be confused with | Fulmen FL600 (60 Ah, 640 A), Fulmen FL605 (60 Ah, 520 A, positive terminal on the left), Fulmen FB604 (60 Ah, 480 A) | ## Fulmen FL604 vs FL754, FL605 and FL600 The real differences between the FL604 and the closest Fulmen models: | Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight | |---|---|---|---|---|---| | Fulmen FL604 (this one) | 60 Ah | 520 A | 230 × 173 × 222 | right | 15.8 kg | | Fulmen FL754 | 75 Ah | 750 A | 260 × 173 × 222 | right | 19 kg | | Fulmen FL605 | 60 Ah | 520 A | 230 × 173 × 222 | left | 15.8 kg | | Fulmen FL600 | 60 Ah | 640 A | 242 × 175 × 190 | right | 17 kg | - Fulmen FL754: 15 Ah more, 230 A more cranking power, a different case (260 × 173 × 222 mm). - If the positive terminal of your battery is on the other side, the one you need is the Fulmen FL605 (positive terminal on the left). - Fulmen FL600: the same capacity, 120 A more cranking power, a different case (242 × 175 × 190 mm). ## Equivalents and alternatives to the Fulmen FL604 As the FL604 is an EFB, only EFB or AGM batteries of the same size and polarity are listed: you can step up to AGM, but not down to a conventional battery. | Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) | |---|---|---|---|---| | Exide EL604 | EFB | 60 Ah | 520 A | 230 × 173 × 222 | | Tudor TL604 | EFB | 60 Ah | 520 A | 230 × 173 × 222 | | Deta DL604 | EFB | 60 Ah | 520 A | 230 × 173 × 222 | ## Inside the FL604: EFB technology The FL604 is an EFB: flooded lead-acid with reinforced plates and separators for Start-Stop. Compared with a conventional battery, the FL604 withstands far more starts and partial discharges. ## Before ordering the FL604, check this - The FL604 is an EFB: it suits cars that had an EFB or a conventional battery. If yours had an AGM, fit another AGM. - The FL604 delivers 520 A cold cranking (EN standard); do not go below what your original battery states. - With 60 Ah, the FL604 replaces an original battery of that capacity or slightly less. - Polarity of the FL604: positive terminal on the right (if yours has it on the other side, the cables will not reach). - Length, width and height of the FL604: 230 × 173 × 222 mm (European case size D23). ## Frequently asked questions about the Fulmen FL604 ### FL604 or FL754: which one suits me? Compared with the FL604, the Fulmen FL754 has 15 Ah more and 230 A more cranking power. If your current battery says 750 A or more, choose the FL754; if it says 520 A or less, the FL604 is enough. Mind the space: the FL754 measures 260 × 173 × 222 mm. ### Fulmen FL604 or FL605: what is the difference? Only the polarity: the FL604 has the positive terminal on the right and the FL605 the positive terminal on the left. Capacity (60 Ah), cranking power and dimensions are identical. ### Can the Fulmen FL604 be used in a car with Start-Stop? Yes, the FL604 is an EFB: it suits Start-Stop without brake energy recovery, or cars that already had an EFB. If your car left the factory with an AGM, fit another AGM. ### How much does the Fulmen FL604 weigh? 15.8 kg, with 60 Ah of capacity. For reference, the Fulmen FL754 (75 Ah) weighs 19 kg. ### Which battery is equivalent to the Fulmen FL604? In EFB or AGM, with its dimensions and polarity: Exide EL604, Tudor TL604 and Deta DL604. A conventional battery does not replace the FL604. ### What case size is the Fulmen FL604? Case size D23: 230 × 173 × 222 mm. The FL604 fits any standard D23 battery tray such as the Exide EL604. ### Which charger does the Fulmen FL604 need? An automatic charger with a lead-acid or EFB mode. Modern chargers recognise it like a conventional battery; avoid old ones without voltage control. ## Keep comparing: alternatives to the FL604 - [More start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb) - [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries) - [Exide EL604](https://bateriasonline.es/en/exide-el604) · 60 Ah, 520 A, 230×173×222 mm - [Tudor TL604](https://bateriasonline.es/en/tudor-tl604) · 60 Ah, 520 A, 230×173×222 mm --- *bateriasonline.es — Batteries and accessories · 2026-11-10*