Varta A7 Dynamic AGM · Start-Stop battery 70Ah 760A

Yes. AGM (Absorbent Glass Mat) technology, 70 Ah and 12 V: sealed lead-acid, with the electrolyte held in glass fibre. It is the technology required by cars with advanced Start-Stop and regenerative braking. It withstands more cycles than a conventional battery and copes better with heat.

Yes: being AGM, the Varta A7 is designed for Start-Stop cars. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. 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.

Allow 15-30 minutes and a 10 mm spanner for a L3 case like this one. If the car keeps its battery in the boot or under a seat, it can take up to twice as long. 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. What matters most is the terminal order: removing, negative (−) before positive (+); refitting, positive (+) before negative (−). In between, with the engine off and the key out, release the clamp and fit the new battery the same way round as the original, positive on the right (polarity). Our blog guide covers it in detail; if the owner's handbook describes a different procedure, follow the manufacturer.

As a guide, you can expect the Varta A7 to last 5 to 8 years in mild-climate car use with Start-Stop, although the real figure may be higher or lower. 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.

Before buying, measure the space in your car: one extra millimetre can stop the hold-down clamp from closing. The Varta A7 takes up 278×175×190 mm (length, width and height, terminals included), the European L3 case size, with a B13 hold-down.

On the Varta A7, 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.

According to our data, 1,221 verified vehicle versions are compatible with the A7. 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)). The car manufacturer's specifications always take priority over our tables.

Interchangeable means the same dimensions, same polarity, same Ah and same CCA; for the A7, 70 Ah (760 A cranking). 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.

Sister reference of the A7, practically identical on paper. Compared with the A7 it has the same Ah and cranking power. It costs 16,10 € more. Choose by price and availability: in real use you will not notice a difference.

Same case and same fitting as the A7, from Tudor. Compared with the A7 it has 2 Ah more. It costs 14,35 € less. If you want to save or the A7 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty.

The absorbent glass-fibre mat of an AGM retains the electrolyte, so it cannot leak and withstands considerably more cycles than a conventional battery. Compared with an EFB it resists tilted positions, heavy vibration and extreme temperatures better, and it is the recommended option where there is regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop). The Varta A7 has a capacity of 70 Ah.

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. Without registration there is no starting problem: the alternator adjusts the profile within a few days. A workshop only needs an OBD scanner and a few minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft.