# Car battery Tudor TB858 12V 85Ah 800A ![Car battery Tudor TB858 12V 85Ah 800A](https://baterias.com/3480-home_default/battery-tudor-tb858-12v-85ah-800a.jpg) > Tudor TB858 car battery 12V 85Ah 800A. TECHNICA range. Dimensions 306×192×192 mm, + terminal on the left. Check fitment by plate. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) → [TUDOR](https://baterias.com/gb/tudor) - **Canonical URL**: https://baterias.com/gb/battery-tudor-tb858-12v-85ah-800a - **Language**: en-GB - **Brand**: TUDOR - **Reference**: BCOM-TUDOR-TB858 - **EAN**: 3661024057141 - **MPN**: TB858 - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | TUDOR | | Reference | TB858 | | Model | TUDOR TECHNICA | | Voltage (V) | 12 V | | Largo | 306 mm | | Ancho | 192 mm | | Alto | 192 mm | | Peso | 19.5 kg | | Tecnología | Flooded | | EAN | 3661024057141 | | Terminal layout | Positive terminal on the left | | Terminal type | EN taper post | | Hold down | B1 | | Cold cranking amps (EN) | 800 A | | Capacity (C20) | 85 Ah (c20) | | Case type | G65 | ## Quick description **Tudor TB858 12V 85Ah 800A** is a ready-to-use passenger car battery, sealed and maintenance-free. Delivers the cranking amps the engine needs in cold weather and keeps stable voltage for modern car loads (ECU, sensors, climate control, infotainment). ## Why this car battery? - **Original-equipment quality** without dealership prices - **Lasts 4 to 6 years** buy once instead of twice - **Real human tech support** if you have any doubts before buying 🔌 Voltage 12 V ⚡ Capacity 85 Ah C20 🔋 Cold cranking 800 A EN-1 📏 Dimensions 306×192×192 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the left ⚖️ Weight 19,5 kg 🏷️ Model TUDOR TECHNICA ## Description ## Car battery Tudor TB858 Technica 85Ah 800A 12V 12*V* Voltage 85*Ah* Capacity 800*A* Cold cranking 19.50*kg* Weight The **Tudor TB858 car battery** is rated at **12 V**, **85 Ah** and **800 A** of cold cranking current (EN) from the **Technica** range, and is designed for passenger cars with conventional starting, without a Start-Stop system. It replaces the original battery without adaptation in cars with a 306 × 192 × 192 mm format: same 85 Ah capacity and the positive terminal on the left. - Direct replacement for the original battery in size and terminals. - Original-equipment build quality without the dealership price. - Conventional lead-acid: the most proven and economical technology. - Reliable cold starts, even after weeks without driving. ### What the Tudor TB858 is for With 85 Ah, the Tudor TB858 is sized for passenger cars with conventional starting, without a Start-Stop system. It is a direct replacement for the original battery as long as dimensions and terminals match. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 19.50 kg, EN taper post terminals and B1 hold-down. ### Will it fit your current battery tray? The Tudor TB858 is made in the 306 × 192 × 192 mm format and weighs 19.50 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 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. ### The Tudor TB858: Technica range and conventional lead-acid technology The **Technica** is the Tudor range the TB858 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. Conventional lead-acid is the benchmark against which other technologies are compared: good cranking current, great tolerance to alternator charging and the best price per amp-hour. ### Why choose Tudor batteries 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Official warranty The Tudor TB858 comes with the **manufacturer's official warranty** against manufacturing defects; the exact period is stated in the brand's conditions. If it fails through a defect within the period, we replace it free of charge. ### How to make it last longer On batteries with filler caps, check the electrolyte level and top up only with distilled water. In normal daily use the alternator keeps the battery charged; if the car stands for weeks, a maintenance charge once a month prevents deep discharge. ### Shipping, delivery and returns Order **before 6:00 pm** 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 **14 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 do I fit the TB858 model in my car? Steps: 1) switch off and remove the key; 2) find the battery (bonnet, boot or under a seat); 3) undo the negative (−), then the positive (+); 4) remove the clamp and the old battery; 5) fit the new one facing the same way (positive on the left) to match the polarity; 6) connect the positive (+) and finally the negative (−). 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. Our blog guide covers it in detail; if the owner's handbook describes a different procedure, follow the manufacturer. ### How long does the Tudor TB858 battery last? There is no exact figure: for a battery such as the Tudor TB858, a reasonable guide is 4 to 7 years in regular use (depends on technology and climate). Many factors play a part: how it is used (lots of short trips, for example), temperature (cold makes every start harder and intense heat evaporates the electrolyte), the condition of the alternator and charging system, power drawn with the engine off and maintenance, as well as the type of car and whether it has Start-Stop. ### What are the dimensions of the Tudor TB858 battery? Measure your car's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. Length × width × height: 306x192x192 mm. Height is measured to the top of the terminals. Hold-down: B1. ### What polarity does the Tudor TB858 battery have? It has the positive on the left (polarity). It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Put it in front of you, terminals towards you: the post with the red ring and the + sign is the positive. ### Is the TB858 valid for my vehicle? For your own vehicle: type your number plate into the finder (DGT/DVLA/KBA identify model and engine), check the "Compatible vehicles" tab below, listing vehicles verified by our technical team, or message us on WhatsApp with make, model, engine and year; we reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). If our table and the car handbook disagree, go with what the manufacturer says. ### Which batteries are equivalent to the Tudor TB858? A direct equivalent needs what this TB858 offers: 306×192×192 mm, positive on the left, the same Ah and CCA. Technology matters too: in Start-Stop cars, an EFB cannot be replaced with a conventional battery. The options at the same level are in the "Equivalents" section of this page. ## 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 --- *baterias.com — Automotive batteries · 2026-11-07*