# Auxiliary battery Exide EK131 12V 13Ah 200A AGM

![Auxiliary battery Exide EK131 12V 13Ah 200A AGM](https://baterias.com/5587-home_default/battery-exide-ek131-12v-12ah-200a.jpg)

> Exide EK131 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) → [EXIDE](https://baterias.com/gb/exide)

- **Canonical URL**: https://baterias.com/gb/battery-exide-ek131-12v-12ah-200a
- **Language**: en-GB
- **Brand**: EXIDE
- **Reference**: BCOM-EXIDE-EK131
- **EAN**: 3661024036641
- **MPN**: EK131
- **Price**: 62,20 € (VAT incl., Spain)
- **Last updated**: 2026-10-28
- **Stock**: In stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | EXIDE |
| Reference | EK131 |
| Model | EXIDE AUXILIAR |
| Voltage (V) | 12 V |
| Largo | 150 cm |
| Ancho | 90 cm |
| Alto | 145 cm |
| Peso | 4.5 kg |
| Tecnología | AGM |
| EAN | 3661024036641 |
| Terminal layout | Positive terminal on the left |
| Cold cranking amps (EN) | 200 A |
| Capacity (C20) | 13 Ah (c20) |

## Quick description

**Exide EK131 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

🔌 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
EXIDE Start-Stop Auxiliary

## Description

## Auxiliary battery Exide EK131 Auxiliar 13Ah 200A 12V

12*V* Voltage
13*Ah* Capacity
200*A* Cold cranking
4.50*kg* Weight

The **Exide EK131** with AGM technology is the **13 Ah**, **12 V** support battery for the auxiliary network of cars with advanced Start-Stop and heavy electronics. Its 150 × 90 × 145 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.
- Direct replacement for the original auxiliary battery.
- Supports advanced Start-Stop systems.
- Protects the main battery and the alternator.
- AGM: faster recharging and better cycle resistance than a conventional battery.

### What the Exide EK131 is for

As an auxiliary battery, the Exide EK131 works alongside the main one; replace it when the vehicle reports a fault in the support network. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 4.50 kg.

### Dimensions, polarity and mounting

In terms of format, the Exide EK131 measures 150 × 90 × 145 mm (length × width × height) 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. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

### Why choose Exide batteries

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. All the Exide batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

### The Exide EK131: Auxiliar range and AGM technology

Within the Exide catalogue, the **Auxiliar** series groups the references designed for this use. The EK131 is the 13 Ah model of that family, with the same performance as its siblings in other sizes.
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.

### Care and maintenance

The auxiliary battery works alongside the main one: if a support-network fault warning appears, check both. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.

### Official warranty

The Exide EK131 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.

### Delivery times 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 the Exide EK131 an AGM battery and what are the benefits of AGM?

Yes. The EK131 from Exide 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 EK131 model suitable for Start-Stop cars?

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 long does the Exide EK131 battery last?

Expected lifespan of the Exide EK131 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 Exide EK131 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.

### What polarity does the Exide EK131 battery have?

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 Exide EK131 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 EK131 typically fits a wide range of European vehicles thanks to its standard DIN case format.

### What are the equivalents of the EK131 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 Exide EK131 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 Exide EK131 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 Exide EK131 ships factory-charged at 80-90% so you can use it straight after fitting.


## Equivalent batteries

- [TUDOR TK131](https://baterias.com/gb/battery-tudor-tk131-12v-13ah-200a)
- [VARTA AUX14](https://baterias.com/gb/battery-varta-aux14-12v-13ah-200a)

## Reviews

- **Average rating**: 3 / 5 (1 reviews)

Average rating 3/5 from 1 verified-purchase reviews (ks_recovery, unfiltered). The 3 most recent:

- ★★★ **luis A.** (2026-08-19): *A bateria foi trocada por uma tudor* — A bateria que chegou foi uma Tudor, pois fui informado que não estava disponível a bateria Exide. E a bateria que chegou é em segunda mão com marcas visíveis de uso anterior conforme foi reportado anteriormente, embora nunca tenha sido dada resposta ou explicação

## 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

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*baterias.com — Automotive batteries · 2026-10-29*