# Tudor TK111 · Auxiliary battery 12V 11Ah 150A

![Tudor TK111 · Auxiliary battery 12V 11Ah 150A](https://bateriasonline.es/2449-home_default/tudor-tk111.jpg)

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

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

- **Canonical URL**: https://bateriasonline.es/en/tudor-tk111
- **Language**: en
- **Brand**: Tudor
- **Reference**: BOL-TUDOR-TK111
- **EAN**: 3661024056564
- **MPN**: TK111
- **Price**: 166,11 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Tudor |
| Range | TUDOR 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 Tudor TK111 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

## Where the Tudor TK111 fits

The Tudor TK111 is an auxiliary vehicle battery: it powers back-up functions such as Start-Stop, electric steering or the emergency system while the main battery starts the engine. Without it, Start-Stop or back-up warnings appear on the dashboard.
The TK111 belongs to the Tudor TUDOR Start-Stop Auxiliary range. [The full range of Tudor batteries](https://bateriasonline.es/en/tudor-batteries)

## Equivalents and alternatives to the Tudor TK111

Other AGM batteries that fit the TK111's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EK111 | 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 |

## Tudor TK111 vs TK131 and TK091: differences

How the TK111 compares with Tudor batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Tudor TK111 (this one) | 11 Ah | 150 A | 150 × 90 × 130 | left | 3.9 kg |
| Tudor TK131 | 13 Ah | 200 A | 150 × 90 × 145 | left | 4.5 kg |
| Tudor TK091 | 9 Ah | 120 A | 150 × 90 × 105 | left | 3.1 kg |

- Tudor TK131: 2 Ah more, 50 A more cranking power, a different case (150 × 90 × 145 mm).
- Tudor TK091: 2 Ah less, 30 A less cranking power, a different case (150 × 90 × 105 mm).

## Inside the TK111: AGM technology

The TK111 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Before ordering the TK111, check this

- Length, width and height of the TK111: 150 × 90 × 130 mm.
- The TK111 has the positive terminal on the left: compare it with your current battery.
- Capacity of the TK111: 11 Ah; the same as your current battery or slightly more is fine.
- The TK111 delivers 150 A cold cranking (EN standard); do not go below what your original battery states.

## Part numbers and codes for the Tudor TK111

The TK111 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | TK111 |
|---|---|
| EAN | 3661024056564 |
| Terminal type | M04 |
| Not to be confused with | Tudor TK151 (15 Ah, 200 A), Tudor TK131 (13 Ah, 200 A) |

## Frequently asked questions about the Tudor TK111

### TK111 or TK131: which one suits me?

Compared with the TK111, the Tudor TK131 has 2 Ah more and 50 A more cranking power. If your current battery says 200 A or more, choose the TK131; if it says 150 A or less, the TK111 is enough. Mind the space: the TK131 measures 150 × 90 × 145 mm.

### How much does the Tudor TK111 weigh?

3.9 kg, with 11 Ah of capacity. For reference, the Tudor TK131 (13 Ah) weighs 4.5 kg.

### Which battery is equivalent to the Tudor TK111?

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

### Which side is the positive terminal on the Tudor TK111?

On the TK111, 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.

## Other options if you are unsure about the TK111

- [More auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries)
- [More Tudor models](https://bateriasonline.es/en/tudor-batteries)
- [Exide EK111](https://bateriasonline.es/en/exide-ek111) · 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 · 2026-11-10*