# Tudor TB858 · Car battery 12V 85Ah 800A

![Tudor TB858 · Car battery 12V 85Ah 800A](https://bateriasonline.es/2833-home_default/tudor-tb858.jpg)

> Tudor TB858: 85 Ah car battery, 800 A (EN), 306×192×192 mm, positive terminal on the left. Equivalent to Exide EB858. Price on request: ask for a free quote.

**Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Tudor](https://bateriasonline.es/en/tudor-batteries)

- **Canonical URL**: https://bateriasonline.es/en/tudor-tb858
- **Language**: en
- **Brand**: Tudor
- **Reference**: BOL-TUDOR-TB858
- **EAN**: 3661024057141
- **MPN**: TB858
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Tudor |
| Range | TUDOR TECHNICA |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 85 Ah |
| Cold cranking amps (EN) | 800 A |
| Length | 306 mm |
| Width | 192 mm |
| Height | 192 mm |
| Weight | 19.5 kg |
| Polarity | Positive terminal on the left |

## Quick description

The Tudor TB858 is a car battery with 12 V, 85 Ah and 800 A cold cranking current, measuring 306 × 192 × 192 mm, with the positive terminal on the left.

## Description

## Who the Tudor TB858 is for

The Tudor TB858 is a starter battery for cars without Start-Stop: it delivers the current the starter motor needs and then powers lights, control units and audio with the engine off. If your car has no Start-Stop and had a 85 Ah battery, the TB858 is a direct replacement.
At 85 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The TB858 belongs to the Tudor TUDOR TECHNICA range. [The full range of Tudor batteries](https://bateriasonline.es/en/tudor-batteries)

## Part numbers and codes for the Tudor TB858

The TB858 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | TB858 |
|---|---|
| EAN | 3661024057141 |
| Not to be confused with | Tudor TB758 (75 Ah, 770 A), Tudor TB558 (55 Ah, 620 A), Tudor TB852 (85 Ah, 760 A, positive terminal on the right) |

## Tudor TB858 vs TB741 and TB955: differences

Torn between the TB858 and another similar Tudor? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Tudor TB858 (this one) | 85 Ah | 800 A | 306 × 192 × 192 | left | 19.5 kg |
| Tudor TB741 | 74 Ah | 680 A | 278 × 175 × 190 | left | 16.6 kg |
| Tudor TB955 | 95 Ah | 760 A | 306 × 173 × 222 | left | 20.6 kg |

- Tudor TB741: 11 Ah less, 120 A less cranking power, a different case (278 × 175 × 190 mm).
- Tudor TB955: 10 Ah more, 40 A less cranking power, a different case (306 × 173 × 222 mm).

## Equivalents and alternatives to the Tudor TB858

Batteries that fit the TB858's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the TB858.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EB858 | Lead-acid | 85 Ah | 800 A | 306 × 192 × 192 |

## Inside the TB858: lead-acid technology

The TB858 is a conventional lead-acid battery, with plates immersed in liquid electrolyte. Avoid leaving them discharged, as they sulphate, and charge them with a charger that cuts off or switches to maintenance when finished.

## What to look at before buying the TB858

- If your car has Start-Stop, the TB858 is not the right one: it needs an EFB or an AGM.
- Cold cranking: 800 A (EN), equal to or higher than the original.
- Capacity of the TB858: 85 Ah; the same as your current battery or slightly more is fine.
- With the terminals facing you, the positive terminal of the TB858 is on the left.
- Measure the space: the TB858 takes up 306 × 192 × 192 mm.

## Frequently asked questions about the Tudor TB858

### TB858 or TB741: which one suits me?

Compared with the TB858, the Tudor TB741 has 11 Ah less and 120 A less cranking power. The TB858 cranks harder; the TB741 is only a good option if your original battery says 680 A or less. Mind the space: the TB741 measures 278 × 175 × 190 mm.

### Can the Tudor TB858 be used in a car with Start-Stop?

No. The TB858 is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM.

### How much does the Tudor TB858 weigh?

19.5 kg, with 85 Ah of capacity. For reference, the Tudor TB741 (74 Ah) weighs 16.6 kg.

### Which battery is equivalent to the Tudor TB858?

With the same dimensions, polarity and similar capacity you have the Exide EB858. As the TB858 is a conventional battery, an EFB or AGM of the same size also works.

### Which side is the positive terminal on the Tudor TB858?

On the TB858, 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 Tudor TB858 need?

An automatic lead-acid charger with cut-off or maintenance mode, rated at 10 to 20% of its capacity in amps. If it is a vented type, check the electrolyte level and top up only with distilled water.

## Other options if you are unsure about the TB858

- [All car batteries](https://bateriasonline.es/en/car-batteries)
- [More Tudor models](https://bateriasonline.es/en/tudor-batteries)
- [Exide EB858](https://bateriasonline.es/en/exide-eb858) · 85 Ah, 800 A, 306×192×192 mm

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