# Auxiliary battery Kronobat AUX14 12V 13Ah 200A AGM ![Auxiliary battery Kronobat AUX14 12V 13Ah 200A AGM](https://baterias.com/3351-home_default/best-price-battery-12v-13ah-agm-aux14.jpg) > Kronobat AUX14 auxiliary battery 12V 13Ah 200A AGM. AUXILIAR range. Dimensions 150Γ—87Γ—146 mm, + terminal on the left. Check fitment by plate. **Category:** [Auxiliary Batteries](https://baterias.com/gb/auxiliary-batteries) β†’ [KRONOBAT](https://baterias.com/gb/kronobat) - **Canonical URL**: https://baterias.com/gb/best-price-battery-12v-13ah-agm-aux14 - **Language**: en-GB - **Brand**: KRONOBAT - **Reference**: BCOM-KRONOBAT-AUX14 - **MPN**: AUX14 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | Kronobat | | Reference | AUX14 | | Model | AUXILIAR | | Voltage (V) | 12 V | | Largo | 150 mm | | Ancho | 87 mm | | Alto | 146 mm | | Peso | 4.12 kg | | TecnologΓ­a | AGM | | Terminal layout | Positive terminal on the left | | Terminal type | Y4 | | Cold cranking amps (EN) | 200 A | | Capacity (C20) | 13 Ah (c20) | ## Quick description **Kronobat AUX14 12V 13Ah 200A** is an auxiliary battery: it supports the Start-Stop system and on-board electronics during stops, without draining the main battery. ## Why this auxiliary 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 πŸ”Œ Voltage 12 V ⚑ Capacity 13 Ah C20 πŸ”‹ Cold cranking 200 A EN-1 πŸ“ Dimensions 150Γ—87Γ—146 mm βš™οΈ Technology AGM 🧭 Polarity Positive on the left βš–οΈ Weight 4,12 kg 🏷️ Model AUXILIAR ## Description ## Auxiliary battery Kronobat AUX14 Auxiliar 13Ah 200A 12V 12*V* Voltage 13*Ah* Capacity 200*A* Cold cranking 4.12*kg* Weight The **12 V**, **13 Ah** **Kronobat AUX14** auxiliary battery from the **Auxiliar** range with AGM technology powers the auxiliary network of cars with advanced Start-Stop and heavy electronics. Its 150 Γ— 87 Γ— 146 mm and the positive terminal on the left make it the exact replacement for the 13 Ah battery fitted as standard to many vehicles with an auxiliary battery. - Protects the main battery and the alternator. - AGM: faster recharging and better cycle resistance than a conventional battery. - Direct replacement for the original auxiliary battery. - Supports advanced Start-Stop systems. ### What the Kronobat AUX14 is for The Kronobat AUX14 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 4.12 kg and Y4 terminals. ### The Kronobat AUX14: Auxiliar range and AGM technology The AUX14 is part of the Kronobat **Auxiliar** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. 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. ### Will it fit your current battery tray? In terms of format, the Kronobat AUX14 measures 150 Γ— 87 Γ— 146 mm (length Γ— width Γ— height) and weighs 4.12 kg. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses Y4 terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### Kronobat: the maker behind the AUX14 With Kronobat we offer an own-brand alternative without compromising on quality: European manufacturing, original-equipment controls and the direct backing of baterias.com for warranty and advice. We guarantee that every Kronobat arrives new, charged and with the manufacturer's full warranty. ### Usage and maintenance tips The auxiliary battery works alongside the main one: if a support-network fault warning appears, check both. Replace it with the same technology and capacity as the original. ### Official warranty The Kronobat AUX14 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. ### Shipping, delivery and returns Same-day dispatch from our warehouse for in-stock orders placed **before [[ks:cutoff]]**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is the AUX14 model AGM? What does this technology offer? Yes. The AUX14 from Kronobat 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 Kronobat AUX14 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 β€” on most modern vehicles registering the battery via OBD is recommended so the alternator automatically applies the optimal charging profile. ### How is the Kronobat AUX14 battery installed in the vehicle? 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 our blog. 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 (βˆ’) 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 β€” with positive on the left match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). 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 Kronobat AUX14 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 Kronobat AUX14 battery? Dimensions (length Γ— width Γ— height) are 150Γ—87Γ—146 mm β€” also written as 150x87x146 mm β€” 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. ### On which side is the positive of the AUX14 model? Polarity: positive on the left. To identify it, place the battery in front of you with the terminals facing you and check which side the positive (+, marked with a red ring) is on. Before buying, verify the polarity matches your current battery: switching polarity forces longer cables or system reconfiguration, with short-circuit risk. ### Will the Kronobat AUX14 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The AUX14 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the AUX14 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 β€” 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. ### When do I need an AGM battery like this one? AGM (Absorbent Glass Mat) technology uses absorbent fibreglass that retains the electrolyte, eliminating leaks and allowing up to 3Γ— 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 Kronobat AUX14 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Do I need to register the Kronobat AUX14 on the car after installation? On most cars it is not strictly necessary β€” 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 β€” the alternator just takes a few days to adjust the profile. The Kronobat AUX14 ships factory-charged at 80-90% so you can use it straight after fitting. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” automotive battery specialists since 2012. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-21*