Deta DK700 · Start-Stop battery 70Ah 760A AGM

Yes, it is AGM. In an AGM battery such as the DK700, the electrolyte is not free but absorbed in a glass-fibre mat inside a sealed lead-acid battery. Its advantages: more charge/discharge cycles than a conventional battery and better heat tolerance. It is also required in cars with advanced Start-Stop and regenerative braking.

Yes, the AGM technology of the DK700 is built for Start-Stop. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. 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.

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. 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. If the car has Start-Stop or BMS: a) the technology must match the original (AGM or EFB) or be higher, because a conventional battery would fail within months; b) undo the negative cable at its nut, leaving the IBS sensor in place; c) it is advisable to register the battery via OBD so the alternator applies the proper charging profile. Before you start, check the car handbook: the manufacturer's procedure always comes first. Our full step-by-step guide is on the blog.

There is no exact figure: for a battery such as the Deta DK700 (AGM), a reasonable guide is 5 to 8 years in mild-climate car use with Start-Stop. Actual lifespan varies with climate (cold starts, heat evaporating the electrolyte), with usage and short journeys, with the condition of the alternator and charging system, with power draw while parked and with maintenance; the type of car and Start-Stop also count.

Length × width × height: 278x175x190 mm (L3 case). Height is measured to the top of the terminals. Hold-down: B13. Measure your car's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close.

It has the positive on the right (polarity). It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Put it in front of you, terminals towards you: the post with the red ring and the + sign is the positive.

The quickest way is to enter your number plate in the finder: DGT/DVLA/KBA detect model and engine. You can also look at the "Compatible vehicles" tab, verified by our technical team, or send us make, model, engine and year on WhatsApp; we answer during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). If our table and the car handbook disagree, go with what the manufacturer says.

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. To replace the Deta DK700 without modifications, the other battery must be identical in size (L3 case), polarity, Ah and CCA.

The Varta alternative that fits where the DK700 goes, with the same polarity. Compared with the DK700 it has the same Ah and cranking power. It costs €122.95 more. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.

The Exide alternative that fits where the DK700 goes, with the same polarity. Compared with the DK700 it has 2 Ah more. It costs €103.80 more. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.

Many more charge/discharge cycles than a conventional battery and no leaks: that is what AGM technology brings, with the electrolyte absorbed in glass fibre. It is the recommended choice for advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop) and copes better than an EFB with tilting, vibration and extreme temperatures. This DK700 delivers 760 A cold cranking (EN).

On most cars it is not strictly necessary: the alternator detects the new battery and adapts the charge by itself. It is advisable, though, to register it via OBD so the optimum profile applies from the first minute and the battery lasts as long as possible, 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. To do it yourself: VCDS or Carista on VAG, Bimmercode on BMW, iCarsoft. At a workshop with an OBD scanner it takes minutes.