# Auxiliary battery Tudor TK131 12V 13Ah 200A AGM ![Auxiliary battery Tudor TK131 12V 13Ah 200A AGM](https://baterias.com/3481-home_default/battery-tudor-tk131-12v-13ah-200a.jpg) > Tudor TK131 auxiliary battery 12V 13Ah 200A AGM. Start-Stop Auxiliary range. Dimensions 150×90×145 mm, + terminal on the left. Check fitment by plate. **Category:** [Auxiliary Batteries](https://baterias.com/gb/auxiliary-batteries) → [TUDOR](https://baterias.com/gb/tudor) - **Canonical URL**: https://baterias.com/gb/battery-tudor-tk131-12v-13ah-200a - **Language**: en-GB - **Brand**: TUDOR - **Reference**: BCOM-TUDOR-TK131 - **EAN**: 3661024056601 - **MPN**: TK131 - **Price**: 63,60 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | TUDOR | | Reference | TK131 | | Model | TUDOR AUXILIAR | | Voltage (V) | 12 V | | Largo | 150 mm | | Ancho | 90 mm | | Alto | 145 mm | | Peso | 4.5 kg | | Tecnología | AGM | | EAN | 3661024056601 | | Terminal layout | Positive terminal on the left | | Terminal type | M04 | | Hold down | B0 | | Cold cranking amps (EN) | 200 A | | Capacity (C20) | 13 Ah (c20) | | Case type | C56 | ## Quick description **Tudor TK131 12V 13Ah 200A** is an AGM support battery designed for daily cycling while keeping voltage stable for the vehicle systems. ### 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 🔌 Voltage 12 V ⚡ Capacity 13 Ah C20 🔋 Cold cranking 200 A EN-1 📏 Dimensions 150×90×145 mm ⚙️ Technology AGM 🧭 Polarity Positive on the left ⚖️ Weight 4,5 kg 🏷️ Model TUDOR Start-Stop Auxiliary ## Description ## Auxiliary battery Tudor TK131 Auxiliar 13Ah 200A 12V 12*V* Voltage 13*Ah* Capacity 200*A* Cold cranking 4.50*kg* Weight The **Tudor TK131** with AGM technology is the **13 Ah**, **12 V** support battery for the auxiliary network of cars with advanced Start-Stop and heavy electronics. Measuring 150 × 90 × 145 mm and the positive terminal on the left, it is the direct replacement for vehicles with an auxiliary battery fitted from the factory with a 13 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 Tudor TK131 is for The Tudor TK131 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 4.50 kg, M04 terminals and B0 hold-down. ### Dimensions, polarity and mounting The Tudor TK131 is made in the 150 × 90 × 145 mm format and weighs 4.50 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 a B0 hold-down and M04 terminals, 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. ### The Tudor TK131: Auxiliar range and AGM technology Within the Tudor catalogue, the **Auxiliar** series groups the references designed for this use. The TK131 is the 13 Ah model of that family, with the same performance as its siblings in other sizes. 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. ### Tudor: the maker behind the TK131 Tudor has made batteries in Spain for more than a century and remains one of the brands most trusted by Spanish workshops for reliability and value. All the Tudor batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Official warranty The Tudor TK131 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 Replace it with the same technology and capacity as the original. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### When you get it and how to return it 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 the Tudor TK131 an AGM battery and what are the benefits of AGM? Yes. The TK131 from Tudor 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 Tudor TK131 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 TK131 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 long does the Tudor TK131 battery last? Expected lifespan of the Tudor TK131 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 Tudor TK131 battery? Dimensions (length × width × height) are 150×90×145 mm — also written as 150x90x145 mm — 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. ### Is the TK131 valid for my vehicle? 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 TK131 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the TK131 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. ### What advantages does the Tudor TK131 AGM battery offer over an EFB? 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 Tudor TK131 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Will my car recognise the new battery automatically? 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 Tudor TK131 ships factory-charged at 80-90% so you can use it straight after fitting. ## Equivalent batteries - [EXIDE EK131](https://baterias.com/gb/battery-exide-ek131-12v-12ah-200a) - [VARTA AUX14](https://baterias.com/gb/battery-varta-aux14-12v-13ah-200a) ## Reviews - **Average rating**: 4.82 / 5 (27 reviews) ## 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 · 2026-09-28*