Varta N72 Dynamic EFB · Start-Stop battery 72Ah 760A

Yes: the N72 (72 Ah) is an EFB, an evolution of the flooded lead-acid battery with additives that strengthen the plates. More affordable than an equivalent AGM and with more cycles than a conventional battery (though fewer than AGM), it is what cars with basic Start-Stop use, without regenerative braking.

Yes, the EFB technology of the N72 is built for 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. Registering it via OBD is advisable on most modern cars (the alternator then applies the optimum profile), but it works from the start.

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. With the engine stopped and the key removed, always start with the negative (−) terminal, then the positive (+). Free the clamp, swap the battery without turning it round (this one has positive on the right) so the polarity stays the same, and reconnect in reverse: positive (+) first, negative (−) last. Start-Stop or BMS specifics: do not remove the IBS sensor on the negative terminal (just loosen the cable nut); after the swap, register the battery via OBD so the alternator charges with the right profile; and never step down in technology: if the car had AGM or EFB, the new one must be the same or better, as a conventional battery lasts only a few months. For the detail, read our guide to replacing the car battery and, if in doubt, the owner's handbook or a main dealer.

There is no exact figure: for a battery such as the Varta N72 (EFB), a reasonable guide is 4 to 6 years in basic Start-Stop car use. It can vary considerably with usage (short or long journeys), temperature, the condition of the alternator and charging system, power drawn with the engine off and maintenance, plus the car itself and Start-Stop. Cold demands more at every start and intense heat evaporates the electrolyte.

The Varta N72 takes up 260×173×225 mm (length, width and height, terminals included). Before buying, measure the space in your car: one extra millimetre can stop the hold-down clamp from closing.

It has the positive on the right (polarity). If your current battery has its positive on the other side, this one is not suitable without longer cables or a reconfigured system (short-circuit risk). Put it in front of you, terminals towards you: the post with the red ring and the + sign is the positive.

Not sure? Try your number plate in the finder (DGT/DVLA/KBA detect model and engine) or the "Compatible vehicles" tab, checked by our technical team; if your car is not there, send us make, model, engine and year on WhatsApp and we will reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). Our database holds 120 verified vehicle versions for the Varta N72. The car manufacturer's specifications always take priority over our tables.

A battery interchangeable with the Varta N72 must match it on dimensions (260×173×225 mm), polarity (positive on the right), capacity (72 Ah) and cranking current (760 A). 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 N72, from Tudor. Compared with the N72 it has 3 Ah more and 10 A of cold cranking less. It costs 30,20 € less. If you want to save or the N72 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty.

The Exide alternative that fits where the N72 goes, with the same polarity. Compared with the N72 it has 3 Ah more and 10 A of cold cranking less. It costs 9,35 € less. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.

EFB from the factory? Stay with EFB; AGM is optional and only a marginal improvement. AGM from the factory? Then fit an AGM, because an EFB would fall short. This N72 is an EFB. The EFB (Enhanced Flooded Battery) is a reinforced flooded battery: plates with carbon and polyethylene additives and thicker grids, giving it more cycles than a conventional one; for cycles and deep discharges it still sits below an AGM. Its place is basic Start-Stop without regenerative braking, fitted from new in, for example, 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. Even if you do not register the Varta N72, the car will start correctly; the profile adjusts within a few days.