# Start-Stop battery Deta DK820 12V 82Ah 800A AGM ![Start-Stop battery Deta DK820 12V 82Ah 800A AGM](https://baterias.com/3630-home_default/battery-deta-dk820-12v-82ah-800a.jpg) > Deta DK820 Start-Stop battery 12V 82Ah 800A AGM. Dimensions 315×175×190 mm, + terminal on the right. For Start-Stop vehicles. **Category:** [Car batteries equipped with start stop system](https://baterias.com/gb/car-batteries-equipped-with-start-stop-system) → [Deta](https://baterias.com/gb/deta) - **Canonical URL**: https://baterias.com/gb/battery-deta-dk820-12v-82ah-800a - **Language**: en-GB - **Brand**: Deta - **Reference**: BCOM-DETA-DK820 - **EAN**: 3661024027137 - **MPN**: DK820 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | DETA | | Reference | DK820 | | Model | DETA AGM | | Voltage (V) | 12 V | | Largo | 315 mm | | Ancho | 175 mm | | Alto | 190 mm | | Peso | 23.3 kg | | Tecnología | AGM | | EAN | 3661024027137 | | Terminal layout | Positive terminal on the right | | Hold down | B13 | | Cold cranking amps (EN) | 800 A | | Capacity (C20) | 82 Ah (c20) | | Case type | L04 | ## Quick description **Deta DK820 12V 82Ah 800A** is a battery designed specifically for Start-Stop vehicles. Withstands up to 3× more start cycles than a conventional battery and maintains performance with BMS and regenerative braking systems. ### Why this Start-Stop battery? - **Designed for Start-Stop** built for the intensive cycling of modern cars - **2 to 3 times longer life** vs fitting a cheap conventional battery - **Fast recovery** recharges in minutes once the engine is running 🔌 Voltage 12 V ⚡ Capacity 82 Ah C20 🔋 Cold cranking 800 A EN-1 📏 Dimensions 315×175×190 mm ⚙️ Technology AGM 🧭 Polarity Positive on the right ⚖️ Weight 23,3 kg 🏷️ Model DETA AGM ## Description ## Start-Stop battery Deta DK820 82Ah 800A 12V 12*V* Voltage 82*Ah* Capacity 800*A* Cold cranking 23.30*kg* Weight Designed for cars with Start-Stop, regenerative braking and heavy electrical loads, the **Deta DK820** combines **82 Ah** and **800 A** of cold cranking current (EN) with AGM construction able to withstand hundreds of starts a day. It measures 315 × 175 × 190 mm and the positive terminal on the right, the format sought by anyone replacing a 82 Ah battery in Start-Stop cars. - Withstands hundreds of starts a day without degrading. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Up to three times the cycles of a conventional battery. - Compatible with regenerative braking and energy management (BMS). ### Size, terminals and hold-down of the Deta DK820 The Deta DK820 is made in the 315 × 175 × 190 mm format and weighs 23.30 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a B13 hold-down, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters. ### What the Deta DK820 is for In Start-Stop cars the battery works far harder than in a conventional car; the Deta DK820 is built for that intensive cycling and to recharge quickly on the move. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 23.30 kg and B13 hold-down. ### Technology inside the Deta DK820 The DK820 is one of the Deta references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### Deta: the maker behind the DK820 Deta combines German engineering with Exide's industrial capacity. Its Power, Senator and PowerPRO series cover everything from urban cars to construction machinery. All the Deta batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Manufacturer's warranty The Deta DK820 comes with the **manufacturer's official warranty**. To keep it valid, always fit the same technology as the original battery (AGM or EFB) and register the replacement if your vehicle requires it. ### Care and maintenance Do not mix technologies: a conventional battery in a Start-Stop car degrades within months. If the vehicle only does very short trips, a periodic maintenance charge with an AGM/EFB-compatible charger greatly extends its life. ### Shipping, delivery and returns Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### Is this battery AGM? What is it for? Yes. The DK820 from Deta uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for cars with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### Is the Deta DK820 battery suitable for Start-Stop? Yes. As AGM technology it is designed for Start-Stop vehicles. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. EFB is recommended for basic Start-Stop; AGM is recommended when regenerative braking is also present, thanks to its higher cycle capability. It works straight out of the box — on most modern vehicles registering the battery via OBD is recommended so the alternator automatically applies the optimal charging profile. ### How do I fit the DK820 model in my car? In most cars it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How many years does this battery last? Expected lifespan of the Deta DK820 is 5 to 8 years in mild-climate car use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured. ### What are the dimensions of the Deta DK820 battery? Dimensions (length × width × height) are 315×175×190 mm — also written as 315x175x190 mm and correspond to the European L4 case size — following the European DIN standard. Always measure the space in your car before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Will the Deta DK820 battery fit my car? Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The DK820 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the DK820 model? Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop cars. See the "Equivalents" section to view recommended options at the same performance level. ### Why choose AGM instead of EFB for my Start-Stop car? AGM (Absorbent Glass Mat) technology uses absorbent fibreglass that retains the electrolyte, eliminating leaks and allowing up to 3× more charge/discharge cycles than a conventional battery. It is the recommended option when the car has advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop). Withstands tilted positions, high vibration and extreme temperatures better than EFB. The Deta DK820 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Do I need to register the Deta DK820 on the car after installation? On most cars it is not strictly necessary — the alternator detects the new battery and adapts the charge automatically. It is recommended to register the battery via OBD so that the alternator applies the optimal charging profile from the first minute and extends the battery life as much as possible (especially on brands with sophisticated BMS: BMW, Mercedes, Audi, Volvo, Land Rover). Any workshop with an OBD scanner (~10-15 € labour) does it in 5 minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. If you do not register, the car will still start correctly — the alternator just takes a few days to adjust the profile. The Deta DK820 ships factory-charged at 80-90% so you can use it straight after fitting. ## Equivalent batteries - [EXIDE EK820](https://baterias.com/gb/battery-exide-ek820-12v-82ah-800a) - [TUDOR TK820](https://baterias.com/gb/battery-tudor-tk820-12v-82ah-800a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-03*