# Start-Stop battery Tudor TK800 AGM Microhybrid 12V 80Ah 800A AGM

![Start-Stop battery Tudor TK800 AGM Microhybrid 12V 80Ah 800A AGM](https://baterias.com/1124-home_default/battery-tudor-tk800-80ah-800a.jpg)

> Tudor TK800 Start-Stop battery 12V 80Ah 800A AGM. Dimensions 315×175×190 mm, + terminal on the right. For Start-Stop vehicles.

**Category:** [Car batteries equipped with start stop system](https://baterias.com/gb/car-batteries-equipped-with-start-stop-system) → [TUDOR](https://baterias.com/gb/tudor)

- **Canonical URL**: https://baterias.com/gb/battery-tudor-tk800-80ah-800a
- **Language**: en-GB
- **Brand**: TUDOR
- **Reference**: BCOM-TUDOR-TK800
- **EAN**: 3661024057646
- **MPN**: TK820
- **Price**: 149,95 € (VAT incl., Spain)
- **Last updated**: 2026-10-28
- **Stock**: In stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | TUDOR |
| Reference | TK800 |
| Model | TUDOR AGM MICROHYBRID |
| Voltage (V) | 12 V |
| Largo | 315 mm |
| Ancho | 175 mm |
| Alto | 190 mm |
| Tecnología | AGM |
| EAN | 3661024057646 |
| Terminal layout | Positive terminal on the right |
| Cold cranking amps (EN) | 800 A |
| Capacity (C20) | 82 Ah (c20) |

## Quick description

**Tudor TK800 12V 80Ah 800A** is a battery designed specifically for Start-Stop vehicles. Withstands up to 3× more start cycles than a conventional battery and maintains performance with BMS and regenerative braking systems.

## Why this Start-Stop 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
80 Ah C20

🔋 Cold cranking
800 A EN-1

📏 Dimensions
315×175×190 mm

⚙️ Technology
AGM

🧭 Polarity
Positive on the right

⚖️ Weight
23,1 kg

🏷️ Model
TUDOR AGM

## Description

## Start-Stop battery Tudor TK800 AGM Microhybrid 82Ah 800A 12V

12*V* Voltage
82*Ah* Capacity
800*A* Cold cranking
23.30*kg* Weight

The **Tudor TK800 Start-Stop battery** offers **12 V**, **82 Ah** and **800 A** of cold cranking current (EN) from the **AGM Microhybrid** range with AGM technology, and is built for cars with Start-Stop, regenerative braking and heavy electrical loads. It measures 315 × 175 × 190 mm and the positive terminal on the right, the format sought by anyone replacing a 82 Ah battery in Start-Stop cars.
- Up to three times the cycles of a conventional battery.
- Compatible with regenerative braking and energy management (BMS).
- Withstands hundreds of starts a day without degrading.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.

### What the Tudor TK800 is for

The Tudor TK800 is designed for cars with Start-Stop, regenerative braking and heavy electrical loads. If your car was fitted with an AGM or EFB battery, always replace it with the same technology: a conventional model would degrade within months. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 23.30 kg.

### Dimensions, polarity and mounting

In terms of format, the Tudor TK800 measures 315 × 175 × 190 mm (length × width × height) and weighs 23.30 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

### The Tudor TK800: AGM Microhybrid range and AGM technology

Within the Tudor catalogue, the **AGM Microhybrid** series groups the references designed for this use. The TK800 is the 82 Ah model of that family, with the same performance as its siblings in other sizes.
AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly.

### Tudor: the maker behind the TK800

Tudor is Spain's historic battery brand, today part of the Exide group. Its car, truck, motorcycle and leisure ranges are built with the same technology and controls as the group's original-equipment references. All the Tudor batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

### Manufacturer's warranty

The Tudor TK800 comes with the **manufacturer's official warranty**. To keep it valid, always fit the same technology as the original battery (AGM or EFB) and register the replacement if your vehicle requires it.

### Care and maintenance

If the vehicle only does very short trips, a periodic maintenance charge with an AGM/EFB-compatible charger greatly extends its life. 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

Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.

## Frequently asked questions

### Is the Tudor TK820 an AGM battery and what are the benefits of AGM?

Yes, it is AGM. In an AGM battery such as the TK820, the electrolyte is not free but absorbed in a glass-fibre mat inside a sealed lead-acid battery. Compared with a conventional battery it withstands more charge/discharge cycles and handles heat better; it is the required technology for cars with advanced Start-Stop and regenerative braking.

### Is the TK820 model suitable for Start-Stop cars?

AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. The Tudor TK820 is AGM, so yes, it is designed for Start-Stop cars. It needs nothing to work, though on most modern cars registering it via OBD is advisable so the alternator adjusts its charging profile. The general recommendation is EFB for basic Start-Stop and AGM where there is regenerative braking (it handles more cycles), unless the car manufacturer says otherwise.

### How is the Tudor TK820 battery fitted in a Start-Stop car?

If the car manufacturer lists any extra step in the handbook, follow it. More detail in how to replace the car battery. Tool: a 10 mm spanner. Time: 15-30 minutes on almost every car, and up to double if the battery is not under the bonnet but in the boot or under a seat. The right order: engine off and key out; disconnect the negative (−) first, then the positive (+); release the hold-down clamp, lift out the old battery and seat the new one in the same position (positive on the right), keeping the polarity; reconnect the positive (+) first and the negative (−) last. Start-Stop or BMS specifics: do not remove the IBS sensor on the negative terminal (just loosen the cable nut); after the swap, register the battery via OBD so the alternator charges with the right profile; and never step down in technology: if the car had AGM or EFB, the new one must be the same or better, as a conventional battery lasts only a few months.

### How many years does this battery last?

As a rough estimate, the Tudor TK820 typically lasts 5 to 8 years in mild-climate car use with Start-Stop; it is a guide figure, not a guaranteed period. What weighs most: temperature (cold makes starts harder and intense heat evaporates the electrolyte), frequent short trips, the condition of the alternator and charging system, power draw while parked and maintenance, not forgetting the type of car and Start-Stop.

### What are the measurements of the TK820 model?

Before buying, measure the space in your car: one extra millimetre can stop the hold-down clamp from closing. The Tudor TK820 takes up 315×175×190 mm (length, width and height, terminals included), the European L4 case size.

### On which side is the positive of the TK820 model?

Polarity of the Tudor TK820: positive on the right. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Seen from the front, terminals towards you, the positive (+) is the post with the red ring.

### Will the Tudor TK820 battery fit my car?

Three routes: the "Compatible vehicles" tab on this page, with the vehicles verified by our technical team; your number plate in the finder, from which DGT/DVLA/KBA detect model and engine; and WhatsApp, with make, model, engine and year, during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The car manufacturer's specifications always take priority over our tables.

### Which batteries are equivalent to the Tudor TK820?

The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop cars an EFB should not be replaced with a conventional battery. A direct equivalent needs what this TK820 offers: 315×175×190 mm, positive on the right, the same Ah and CCA and AGM technology.

### Tudor TK800 or Tudor TK820: which one to choose?

It has the same dimensions, voltage and technology as the TK800, although it is not a manufacturer-approved equivalent. Compared with the TK800 it has the same Ah and cranking power. It costs 28,65 € less. Check the positive terminal side and the original capacity before ordering; otherwise it is a straight swap.

### Tudor TK800 or Varta A6: which one to choose?

It has the same dimensions, voltage and technology as the TK800, although it is not a manufacturer-approved equivalent. Compared with the TK800 it has 2 Ah less. It costs the same. Check the positive terminal side and the original capacity before ordering; otherwise it is a straight swap.

### What advantages does the Tudor TK820 AGM battery offer over an EFB?

The absorbent glass-fibre mat of an AGM retains the electrolyte, so it cannot leak and withstands considerably more cycles than a conventional battery. For regenerative braking systems such as BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO or Volvo i-Stop, AGM is the recommendation; it also copes better than an EFB with tilting, vibration and extreme temperatures. Cold cranking current (EN) of the Tudor TK820: 800 A.

### Do I need to register the Tudor TK820 on the car after installation?

The alternator detects the new battery and adapts the charge automatically, so on most cars it is not compulsory. Even so, it is advisable to register it via OBD so charging is optimum from the first minute and the battery lasts longer, particularly on BMW, Mercedes, Audi, Volvo or Land Rover, with more sophisticated BMS. Without registration there is no starting problem: the alternator adjusts the profile within a few days. Any workshop with an OBD scanner does it in a few minutes; DIY, with VCDS or Carista (VAG group), Bimmercode (BMW) or iCarsoft.


## Reviews

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

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

- ★★★★★ **Maria jose R.** (2026-09-07): *Tienda muy recomendable, genial* — La entrega fue muy bien , la batería genial , todo perfecto. El dueño muy amable al teléfono para solventar mis dudas. En conclusión , recomiendo comprar en esta tienda , el coche funciona muy bien y no he tenido problemas.

## 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 · 2026-11-07*