# Marine battery Tudor TZ800 12V 95Ah 800A EFB

![Marine battery Tudor TZ800 12V 95Ah 800A EFB](https://baterias.com/4656-home_default/battery-tudor-tz800-12v-95ah.jpg)

> Tudor TZ800 marine battery 12V 95Ah 800A EFB. Marina & Leisure Dual EFB range. Dimensions 306×173×222 mm, + terminal on the left. Cranking and house duties.

**Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [TUDOR](https://baterias.com/gb/tudor)

- **Canonical URL**: https://baterias.com/gb/battery-tudor-tz800-12v-95ah
- **Language**: en-GB
- **Brand**: TUDOR
- **Reference**: BCOM-TUDOR-TZ800
- **EAN**: 3661024057813
- **MPN**: TZ800
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Largo | 306 mm |
| Ancho | 173 mm |
| Alto | 222 mm |
| Peso | 21.8 kg |
| Tecnología | EFB |
| EAN | 3661024057813 |
| Terminal layout | Positive left |
| Terminal type | EN taper post |
| Hold down | Korean B1 |
| Cold cranking amps (EN) | 800 A |
| Capacity (C20) | 95 Ah (c20) |

## Quick description

**Tudor TZ800 95Ah 800A** is a marine battery, vibration- and deep-discharge resistant, suitable both for outboard engine starting and for onboard auxiliary services (navigation lights, GPS, sonar, fridge). Sealed and maintenance-free.

### Why this marine battery?

- **Marine design** built for boat swell and vibration
- **Dual function** starts the engine and powers onboard services
- **Sealed and safe** maintenance-free even when the boat rolls

⚡ Capacity
95 Ah C20

🔋 Cold cranking
800 A EN-1

📏 Dimensions
306×173×222 mm

⚙️ Technology
EFB

🧭 Polarity
Positive on the left

⚖️ Weight
21,8 kg

## Description

## Marine battery Tudor TZ800 95Ah 800A 12V

12*V* Voltage
95*Ah* Capacity
800*A* Cold cranking
21.80*kg* Weight

The **Tudor TZ800** with EFB technology is a marine battery with **95 Ah** and **800 A** of cold cranking current (EN) for motor and sailing boats, both for engine starting and onboard services. Its 306 × 173 × 222 mm and the positive terminal on the left make it the exact replacement for the 95 Ah battery fitted as standard to many boats.
- Resistant to humidity and salt air.
- Sealed: no spills or gases in the locker.
- Ready for starting outboard and inboard engines.
- EFB: the evolution of the conventional battery for basic Start-Stop cars.

### What the Tudor TZ800 is for

With 95 Ah, the Tudor TZ800 covers motor and sailing boats, both for engine starting and onboard services. At the end of the season, charge it fully before winter storage. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 21.80 kg, EN taper post terminals and Korean B1 hold-down.

### Will it fit your current battery tray?

It has external dimensions of 306 × 173 × 222 mm and weighs 21.80 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. It uses a Korean B1 hold-down and EN taper post terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

### Technology inside the Tudor TZ800

Within the Tudor catalogue, the TZ800 is the 95 Ah model designed for this application.
An EFB is a reinforced flooded battery: its plates retain the active material better and tolerate the cycling imposed by a simple Start-Stop system, at a lower cost than an AGM.

### What Tudor does differently

Tudor has made batteries in Spain for more than a century and remains one of the brands most trusted by Spanish workshops for reliability and value. All the Tudor batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

### Warranty and coverage

The Tudor TZ800 comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

### Usage and maintenance tips

As a service battery, avoid routine discharges below 50% to extend its cycle life. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.

### When you get it and how to return it

Order **before [[ks:cutoff]]** 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 **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.

## Frequently asked questions

### How is the Tudor TZ800 battery installed in the vehicle?

In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### How long does the Tudor TZ800 battery last?

Expected lifespan of the Tudor TZ800 is 4 to 7 years in regular use (depends on technology and climate). 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 Tudor TZ800 battery?

Dimensions (length × width × height) are 306×173×222 mm — also written as 306x173x222 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### Is the TZ800 valid for my vehicle?

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 TZ800 typically fits a wide range of European vehicles thanks to its standard DIN case format.

### What are the equivalents of the TZ800 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 boats. See the "Equivalents" section to view recommended options at the same performance level.


## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-09-30*