# Exide EK111 · Auxiliary battery 12V 11Ah 150A

![Exide EK111 · Auxiliary battery 12V 11Ah 150A](https://bateriasonline.es/252-home_default/exide-ek111.jpg)

> Exide EK111: 11 Ah auxiliary battery, 150 A (EN), 150×90×130 mm, positive terminal on the left, AGM. Equivalent to Tudor TK111.

**Category:** [Auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries) → [Exide](https://bateriasonline.es/en/exide-batteries)

- **Canonical URL**: https://bateriasonline.es/en/exide-ek111
- **Language**: en
- **Brand**: Exide
- **Reference**: BOL-EXIDE-EK111
- **EAN**: 3661024036580
- **MPN**: EK111
- **Price**: 32,74 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Exide |
| Range | EXIDE Start-Stop Auxiliary |
| Application | Auxiliary and back-up use |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 11 Ah |
| Cold cranking amps (EN) | 150 A |
| Length | 150 mm |
| Width | 90 mm |
| Height | 130 mm |
| Weight | 3.9 kg |
| Polarity | Positive terminal on the left |
| Terminal type | M04 |

## Quick description

The Exide EK111 is an auxiliary battery (AGM) with 12 V, 11 Ah and 150 A cold cranking current, measuring 150 × 90 × 130 mm, with the positive terminal on the left.

## Description

## The Exide EK111 at a glance

The Exide EK111 is the second battery fitted in many modern cars. Without it, Start-Stop or back-up warnings appear on the dashboard.
The EK111 belongs to the Exide EXIDE Start-Stop Auxiliary range. [More Exide batteries](https://bateriasonline.es/en/exide-batteries)

## Equivalents and alternatives to the Exide EK111

Other AGM batteries that fit the EK111's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Tudor TK111 | AGM | 11 Ah | 150 A | 150 × 90 × 130 |
| Fulmen FK111 | AGM | 11 Ah | 150 A | 150 × 90 × 130 |
| Deta DK111 | AGM | 11 Ah | 150 A | 150 × 90 × 130 |
| Fulbat AUX12 | AGM | 10.5 Ah | – | 150 × 87 × 130 |

## Exide EK111 vs EK131 and EK091: which one to choose?

How the EK111 compares with Exide batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Exide EK111 (this one) | 11 Ah | 150 A | 150 × 90 × 130 | left | 3.9 kg |
| Exide EK131 | 13 Ah | 200 A | 150 × 90 × 145 | left | 4.5 kg |
| Exide EK091 | 9 Ah | 120 A | 150 × 90 × 105 | left | 3.1 kg |

- Exide EK131: 2 Ah more, 50 A more cranking power, a different case (150 × 90 × 145 mm).
- Exide EK091: 2 Ah less, 30 A less cranking power, a different case (150 × 90 × 105 mm).

## AGM technology in the EK111

Inside, the EK111 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## What to look at before buying the EK111

- The EK111 needs 150 × 90 × 130 mm of space: measure it with the hold-down clamp in place.
- With the terminals facing you, the positive terminal of the EK111 is on the left.
- With 11 Ah, the EK111 replaces an original battery of that capacity or slightly less.
- The EK111 delivers 150 A cold cranking (EN standard); do not go below what your original battery states.

## Part numbers and codes for the Exide EK111

Shops, garages and catalogues identify the EK111 with these codes:

| Commercial reference | EK111 |
|---|---|
| EAN | 3661024036580 |
| Terminal type | M04 |
| Not to be confused with | Exide EK131 (13 Ah, 200 A), Exide EK151 (15 Ah, 200 A) |

## Frequently asked questions about the Exide EK111

### EK111 or EK131: which one suits me?

Compared with the EK111, the Exide EK131 has 2 Ah more and 50 A more cranking power. If your current battery says 200 A or more, choose the EK131; if it says 150 A or less, the EK111 is enough. Mind the space: the EK131 measures 150 × 90 × 145 mm.

### How much does the Exide EK111 weigh?

3.9 kg, with 11 Ah of capacity. For reference, the Exide EK131 (13 Ah) weighs 4.5 kg.

### Which battery is equivalent to the Exide EK111?

Only other AGM batteries with its dimensions and polarity: Tudor TK111, Fulmen FK111 and Deta DK111. Neither an EFB nor a conventional battery replaces the EK111.

### Which side is the positive terminal on the Exide EK111?

On the EK111, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### Which charger does the Exide EK111 need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## More batteries to compare with the EK111

- [Other auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries)
- [The whole Exide range](https://bateriasonline.es/en/exide-batteries)
- [Tudor TK111](https://bateriasonline.es/en/tudor-tk111) · 11 Ah, 150 A, 150×90×130 mm
- [Fulmen FK111](https://bateriasonline.es/en/fulmen-fk111) · 11 Ah, 150 A, 150×90×130 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-11*