# Auxiliary battery Exide EK454 12V 45Ah 380A AGM ![Auxiliary battery Exide EK454 12V 45Ah 380A AGM](https://baterias.com/5593-home_default/battery-exide-ek454-12v-45ah.jpg) > Exide EK454 auxiliary battery 12V 45Ah 380A AGM. Dimensions 237×127×227 mm, + terminal on the right. Check fitment by plate. **Category:** [Auxiliary Batteries](https://baterias.com/gb/auxiliary-batteries) → [EXIDE](https://baterias.com/gb/exide) - **Canonical URL**: https://baterias.com/gb/battery-exide-ek454-12v-45ah - **Language**: en-GB - **Brand**: EXIDE - **Reference**: BCOM-EXIDE-EK454 - **EAN**: 3661024038072 - **MPN**: EK454 - **Price**: 212,40 € (VAT incl., Spain) - **Last updated**: 2026-11-11 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Largo | 237 mm | | Ancho | 127 mm | | Alto | 227 mm | | Peso | 13.5 kg | | Tecnología | AGM | | EAN | 3661024038072 | | Terminal layout | Positive right | | Hold down | B00 | | Cold cranking amps (EN) | 380 A | | Capacity (C20) | 45 Ah (c20) | ## Quick description **Exide EK454 45Ah 380A** is a starter battery with OEM-equivalent quality, designed for modern passenger cars. Delivers reliable cold-cranks even after weeks of inactivity and supports stable auxiliary loads (lights, climate control, infotainment). ## Why this car battery? - **Original-equipment quality** without dealership prices - **Lasts 4 to 6 years** buy once instead of twice - **Real human tech support** if you have any doubts before buying ⚡ Capacity 45 Ah C20 🔋 Cold cranking 380 A EN-1 📏 Dimensions 237×127×227 mm ⚙️ Technology AGM 🧭 Polarity Positive on the right ⚖️ Weight 13,5 kg ## Description ## Auxiliary battery Exide EK454 45Ah 380A 12V 12*V* Voltage 45*Ah* Capacity 380*A* Cold cranking 13.50*kg* Weight Designed for the auxiliary network of cars with advanced Start-Stop and heavy electronics, the **Exide EK454** stabilises the voltage with **45 Ah** with AGM technology. Measuring 237 × 127 × 227 mm and the positive terminal on the right, it is the direct replacement for vehicles with an auxiliary battery fitted from the factory with a 45 Ah battery of this format. - Supports advanced Start-Stop systems. - Direct replacement for the original auxiliary battery. - AGM: faster recharging and better cycle resistance than a conventional battery. - Protects the main battery and the alternator. ### What the Exide EK454 is for The Exide EK454 is designed for the auxiliary network of cars with advanced Start-Stop and heavy electronics: it stabilises the voltage and protects the main battery in cars with heavy electronics. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 13.50 kg and B00 hold-down. ### Will it fit your current battery tray? The Exide EK454 is made in the 237 × 127 × 227 mm format and weighs 13.50 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 B00 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. ### Technology inside the Exide EK454 The EK454 is one of the Exide references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue. In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery. ### What Exide does differently Exide is one of the world's largest battery manufacturers and an original-equipment supplier to many car makers. Its European plants produce starter, industrial and leisure batteries under original-equipment quality controls. We guarantee that every Exide arrives new, charged and with the manufacturer's full warranty. ### Official warranty The Exide EK454 comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you. ### Care and maintenance Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Replace it with the same technology and capacity as the original. ### Shipping, delivery and returns Order **before 6:00 pm** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **14 days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### Is this battery AGM? What is it for? Yes: the EK454 from Exide uses AGM (Absorbent Glass Mat) technology, a sealed lead-acid battery whose electrolyte soaks a glass-fibre mat. 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. ### Is the EK454 model suitable for Start-Stop cars? Yes: being AGM, the Exide EK454 is designed for Start-Stop cars. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. It works once fitted; on most modern cars, registering it via OBD is advisable so the alternator applies the optimum charging profile. As a rule: EFB for basic Start-Stop, AGM when there is also regenerative braking (more cycles); in any case, what the car manufacturer specifies. ### How long does the Exide EK454 battery last? As a guide, you can expect the Exide EK454 to last 5 to 8 years in mild-climate car use with Start-Stop, although the real figure may be higher or lower. 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. ### What are the dimensions of the Exide EK454 battery? Measure the battery tray before ordering: a one-millimetre difference is enough for the hold-down clamp not to close. It measures 237×127×227 mm in length × width × height, with the terminals included in the height. ### On which side is the positive of the EK454 model? On the Exide EK454, the polarity is positive on the right. To check, stand the battery in front of you with the terminals nearest you: the positive (+) is the one with the red ring. 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. ### Is the EK454 valid for my vehicle? 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)). The EK454 typically fits a wide range of European vehicles thanks to its standard DIN case format. In every case, the car manufacturer's specifications (owner's handbook) take precedence. ### Which batteries are equivalent to the Exide EK454? A direct equivalent needs what this EK454 offers: 237×127×227 mm, positive on the right, the same Ah and CCA and AGM technology. 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. ### Exide EK454 or Tudor TK454: which one to choose? It has the same dimensions, voltage and technology as the EK454, although it is not a manufacturer-approved equivalent. Compared with the EK454 it has the same Ah and cranking power. It costs the same. Check the positive terminal side and the original capacity before ordering; otherwise it is a straight swap. ### What advantages does the Exide EK454 AGM battery offer over an EFB? Hence it is recommended for advanced Start-Stop with regenerative braking, such as BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO or Volvo i-Stop, and it handles tilting, vibration and extreme temperatures better than an EFB. 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. Cold cranking current (EN) of the Exide EK454: 380 A. ### Do I need to register the Exide EK454 on the car after installation? 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 the car starts normally; the alternator simply takes a few days to adjust the profile. To do it yourself: VCDS or Carista on VAG, Bimmercode on BMW, iCarsoft. At a workshop with an OBD scanner it takes minutes. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-12*