Kronobat EV-105-AGM EV AGM Start Stop · Battery 105Ah 950A

Yes. AGM (Absorbent Glass Mat) technology, 105 Ah and 12 V: sealed lead-acid, with the electrolyte held in glass fibre. It tolerates heat better and handles more cycles than a conventional battery, which is why it is the required technology with advanced Start-Stop and regenerative braking.

Yes. It is a AGM battery of 105 Ah, designed for vehicles with Start-Stop. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. If the car recovers energy when braking, AGM is recommended for its higher cycle count; for basic Start-Stop, EFB. The manufacturer's specification comes first. It works once fitted; on most modern cars, registering it via OBD is advisable so the alternator applies the optimum charging profile.

For the detail, read our guide to replacing the car battery and, if in doubt, the owner's handbook or a main dealer. Allow 15-30 minutes and a 10 mm spanner for a L6 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. 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.

Estimated lifespan of the Kronobat EV-105-AGM: 5 to 8 years in mild-climate car use with Start-Stop. 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.

It measures 393×175×190 mm in length × width × height, with the terminals included in the height; that is the European L6 case size. Measure the battery tray before ordering: a one-millimetre difference is enough for the hold-down clamp not to close.

The EV-105-AGM has the positive on the right in a L6 case: that is its polarity. Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on. Compare it with the battery you are replacing: if it does not match, cables must be lengthened or the system reconfigured, with a risk of short circuit.

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.

A battery interchangeable with the Kronobat EV-105-AGM must match it on dimensions (393×175×190 mm), polarity (positive on the right), capacity (105 Ah) and cranking current (950 A). 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.

It is the verified Varta equivalent for the EV-105-AGM tray. Compared with the EV-105-AGM it has the same Ah and cranking power. It costs 48,70 € more. Decide by price, brand preference and availability: both fit and crank the same.

Capacity of the EV-105-AGM: 105 Ah. AGM means Absorbent Glass Mat: the electrolyte soaks a glass-fibre mat (no spills), and an AGM battery lasts many more cycles than a conventional one. For regenerative braking systems such as BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO or Volvo i-Stop, AGM is the recommendation; it also copes better than an EFB with tilting, vibration and extreme temperatures.

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.