# Tudor TK151 · Auxiliary battery 12V 15Ah 200A

![Tudor TK151 · Auxiliary battery 12V 15Ah 200A](https://bateriasonline.es/2463-home_default/tudor-tk151.jpg)

> Tudor TK151: 15 Ah auxiliary battery, 200 A (EN), 150×90×145 mm, positive terminal on the left, AGM. Equivalent to Exide EK151.

**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-tk151
- **Language**: en
- **Brand**: Tudor
- **Reference**: BOL-TUDOR-TK151
- **EAN**: 3661024056571
- **MPN**: TK151
- **Price**: 63,46 € (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 | 15 Ah |
| Cold cranking amps (EN) | 200 A |
| Length | 150 mm |
| Width | 90 mm |
| Height | 145 mm |
| Weight | 4.8 kg |
| Polarity | Positive terminal on the left |
| Terminal type | Bornes fines |

## Quick description

Tudor TK151: auxiliary battery (AGM) with 12 V, 15 Ah and 200 A cold cranking current, measuring 150 × 90 × 145 mm, with the positive terminal on the left.

## Description

## The Tudor TK151 at a glance

The Tudor TK151 is the second battery fitted in many modern cars. Without it, Start-Stop or back-up warnings appear on the dashboard.
The TK151 belongs to the Tudor TUDOR Start-Stop Auxiliary range. [More Tudor batteries](https://bateriasonline.es/en/tudor-batteries)

## Equivalents and alternatives to the Tudor TK151

As the TK151 is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EK151 | AGM | 15 Ah | 200 A | 150 × 90 × 145 |
| Fulmen FK151 | AGM | 15 Ah | 200 A | 150 × 90 × 145 |
| Deta DK151 | AGM | 15 Ah | 200 A | 150 × 90 × 145 |
| Exide EK131 | AGM | 13 Ah | 200 A | 150 × 90 × 145 |
| Fulmen FK131 | AGM | 13 Ah | 200 A | 150 × 90 × 145 |
| Deta DK131 | AGM | 13 Ah | 200 A | 150 × 90 × 145 |

## Tudor TK151 vs TK131 and TK111

What sets the TK151 apart from its neighbours in the Tudor range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Tudor TK151 (this one) | 15 Ah | 200 A | 150 × 90 × 145 | left | 4.8 kg |
| Tudor TK131 | 13 Ah | 200 A | 150 × 90 × 145 | left | 4.5 kg |
| Tudor TK111 | 11 Ah | 150 A | 150 × 90 × 130 | left | 3.9 kg |

- Tudor TK131: 2 Ah less, the same cranking power, the same dimensions.
- Tudor TK111: 4 Ah less, 50 A less cranking power, a different case (150 × 90 × 130 mm).

## Inside the TK151: AGM technology

Inside, the TK151 has glass fibre separators (AGM) that hold the electrolyte. The TK151 needs a charger with an AGM mode that does not exceed 14.7 V.

## What to look at before buying the TK151

- Length, width and height of the TK151: 150 × 90 × 145 mm.
- The TK151 has the positive terminal on the left: compare it with your current battery.
- Capacity of the TK151: 15 Ah; the same as your current battery or slightly more is fine.
- Cold cranking: 200 A (EN), equal to or higher than the original.

## Tudor TK151 codes and part numbers

This is how the Tudor TK151 appears on the label and in parts catalogues:

| Commercial reference | TK151 |
|---|---|
| EAN | 3661024056571 |
| Terminal type | Bornes fines |
| Not to be confused with | Tudor TK111 (11 Ah, 150 A), Tudor TK131 (13 Ah, 200 A) |

## Frequently asked questions about the Tudor TK151

### Tudor TK151 or TK131?

Compared with the TK151, the Tudor TK131 has 2 Ah less. With the same cranking power (200 A), the TK151 and the TK131 differ in capacity: the one with more Ah supports more load with the engine off. Both measure 150 × 90 × 145 mm, so they fit the same tray.

### How much does the Tudor TK151 weigh?

The TK151 weighs 4.8 kg. For reference, the Tudor TK131 (13 Ah) weighs 4.5 kg.

### Which battery is equivalent to the Tudor TK151?

Only other AGM batteries with its dimensions and polarity: Exide EK151, Fulmen FK151 and Deta DK151. Neither an EFB nor a conventional battery replaces the TK151.

### Which side is the positive terminal on the Tudor TK151?

The TK151 has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

### Which charger does the Tudor TK151 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.

## Keep comparing: alternatives to the TK151

- [All auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries)
- [Full Tudor catalogue](https://bateriasonline.es/en/tudor-batteries)
- [Exide EK151](https://bateriasonline.es/en/exide-ek151) · 15 Ah, 200 A, 150×90×145 mm
- [Fulmen FK151](https://bateriasonline.es/en/fulmen-fk151) · 15 Ah, 200 A, 150×90×145 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*