Exide EL604 · Start-Stop battery 60Ah 520A EFB

Yes. The EL604 is an EFB (Enhanced Flooded Battery): flooded lead-acid reinforced with plate additives. It goes into cars with basic Start-Stop (no energy recovery when braking): more cycles than a conventional battery, fewer than an AGM, and cheaper than an equivalent AGM.

Yes: being EFB, the Exide EL604 is designed for Start-Stop cars. EFB batteries cover basic Start-Stop (no regenerative braking). It needs nothing to work, though on most modern cars registering it via OBD is advisable so the alternator adjusts its charging profile. The general recommendation is EFB for basic Start-Stop and AGM where there is regenerative braking (it handles more cycles), unless the car manufacturer says otherwise.

Before you start, check the car handbook: the manufacturer's procedure always comes first. Our full step-by-step guide is on the blog. Tool: a 10 mm spanner. Time: 15-30 minutes on almost every car, and up to double if the battery is not under the bonnet but in the boot or under a seat. The right order: engine off and key out; disconnect the negative (−) first, then the positive (+); release the hold-down clamp, lift out the old battery and seat the new one in the same position (positive on the right), keeping the polarity; reconnect the positive (+) first and the negative (−) last. On cars with Start-Stop or BMS, registering the battery via OBD makes the alternator charge with the correct profile. Mind the IBS sensor on the negative terminal too: loosen the cable nut, not the sensor. And the replacement must be the same technology (AGM or EFB) or higher: a conventional battery fails within months.

As a guide, you can expect the Exide EL604 to last 4 to 6 years in basic Start-Stop car use, although the real figure may be higher or lower. Many factors play a part: how it is used (lots of short trips, for example), temperature (cold makes every start harder and intense heat evaporates the electrolyte), the condition of the alternator and charging system, power drawn with the engine off and maintenance, as well as the type of car and whether it has Start-Stop.

Measure the battery tray before ordering: a one-millimetre difference is enough for the hold-down clamp not to close. It measures 230×173×222 mm in length × width × height, with the terminals included in the height.

On the Exide EL604, the polarity is positive on the right. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. To check, stand the battery in front of you with the terminals nearest you: the positive (+) is the one with the red ring.

For your own vehicle: type your number plate into the finder (DGT/DVLA/KBA identify model and engine), check the "Compatible vehicles" tab below, listing vehicles verified by our technical team, or message us on WhatsApp with make, model, engine and year; we reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). In every case, the car manufacturer's specifications (owner's handbook) take precedence.

To replace the Exide EL604 without modifications, the other battery must be identical in size, polarity, Ah and CCA. The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop cars an EFB should not be replaced with a conventional battery.

Same case and same fitting as the EL604, from Varta. Compared with the EL604 it has 5 Ah more and 130 A of cold cranking more. It costs €2.30 less. If you want to save or the EL604 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty.

Same case and same fitting as the EL604, from Tudor. Compared with the EL604 it has the same Ah and cranking power. It costs €26.30 less. If you want to save or the EL604 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty.

If your car left the factory with an EFB, that is the right technology and moving to AGM is optional (a marginal improvement); if it had an AGM, an EFB would fall short. An EFB (Enhanced Flooded Battery) is flooded lead-acid, but reinforced: carbon and polyethylene additives in the plates and thicker grids. It handles more cycles than a conventional battery and copes better with deep discharges, though less well than an AGM. It is fitted as standard to cars with basic Start-Stop, without regenerative braking: Renault Energy TCe, Peugeot/Citroën PureTech, Fiat MultiAir, Hyundai/Kia ISG or Ford EcoBoost.

Advisable, yes; essential, on most cars, no. Registering it via OBD makes the alternator charge with the optimum profile from the first minute and extends battery life, which matters most on brands with sophisticated BMS such as BMW, Mercedes, Audi, Volvo or Land Rover. A workshop only needs an OBD scanner and a few minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. If you do not register the EL604, it will keep starting fine while the alternator adjusts the profile over a few days.