Tudor TL604 EFB Microhybrid · Start-Stop battery 60Ah 520A

Yes. The TL604 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. It is a EFB battery of 60 Ah, designed for vehicles with Start-Stop. EFB batteries cover basic Start-Stop (no regenerative braking). Basic Start-Stop: EFB. Start-Stop with regenerative braking: AGM, which withstands more cycles. Check the handbook for the technology the car manufacturer requires. It needs nothing to work, though on most modern cars registering it via OBD is advisable so the alternator adjusts its charging profile.

With Start-Stop there are three more points: the negative terminal usually carries a battery sensor (IBS), so undo the cable at the terminal nut without removing the sensor; register the battery via OBD so the alternator applies the correct charging profile; and fit the same technology as the original (AGM or EFB) or higher, because a conventional battery wears out within months. 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. Steps: 1) switch off and remove the key; 2) find the battery (bonnet, boot or under a seat); 3) undo the negative (−), then the positive (+); 4) remove the clamp and the old battery; 5) fit the new one facing the same way (positive on the right) to match the polarity; 6) connect the positive (+) and finally the negative (−). If the car manufacturer lists any extra step in the handbook, follow it. More detail in how to replace the car battery.

Estimated lifespan of the Tudor TL604: 4 to 6 years in basic Start-Stop car use. Treat it as an approximate guide, as every case is different. 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.

Its dimensions are 230×173×222 mm, also written 230x173x222 mm; the height already includes the terminals. Check the room available in your car, because a single millimetre too much can stop the clamp from closing.

The TL604 has the positive on the right: that is its polarity. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on.

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)). The TL604 typically fits a wide range of European vehicles thanks to its standard DIN case format. Always cross-check with what the car manufacturer states in the owner's handbook.

A direct equivalent needs what this TL604 offers: 230×173×222 mm, positive on the right, the same Ah and CCA and EFB technology. See the "Equivalents" section of this page for the recommended options at the same performance level. Mind the technology: in Start-Stop cars an EFB is not swapped for a conventional battery.

Same case and same fitting as the TL604, from Varta. Compared with the TL604 it has 5 Ah more and 130 A of cold cranking more. It costs 24,00 € more. If you want to save or the TL604 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty.

It is the verified Exide equivalent for the TL604 tray. Compared with the TL604 it has the same Ah and cranking power. It costs 26,30 € more. Decide by price, brand preference and availability: both fit and crank the same.

EFB is the right technology if your car came with one from the factory (moving up to AGM is optional and the gain marginal). If it came with an AGM, fit an AGM instead. It is still flooded lead-acid, but an EFB reinforces the plates with carbon and polyethylene and uses thicker grids. That gives it more cycles than a conventional battery and deeper discharge tolerance, though less than an AGM. Renault Energy TCe, Peugeot/Citroën PureTech, Fiat MultiAir, Hyundai/Kia ISG and Ford EcoBoost are examples of basic Start-Stop (no regenerative braking) fitted with it from new.

It is not strictly necessary on most cars, because the alternator detects the change and adapts the charge. The advisable step is to register it via OBD: the charging profile is optimum from the first minute and the battery lasts longer, especially on brands with sophisticated BMS (BMW, Mercedes, Audi, Volvo, Land Rover). Without registration there is no starting problem: the alternator adjusts the profile within a few days. Any garage with an OBD scanner can do it in a few minutes. If you prefer to do it yourself: VCDS / Carista (VAG), Bimmercode (BMW) or iCarsoft.