# Truck battery Tudor TJ165A1 12V 165Ah 850A ![Truck battery Tudor TJ165A1 12V 165Ah 850A](https://baterias.com/964-home_default/battery-tudor-tj165a1-165ah-850a.jpg) > Tudor TJ165A1 truck battery 12V 165Ah 850A. START PRO (HD) range. Dimensions 354×241×285 mm. For heavy-duty fleets. **Category:** [Truck Batteries](https://baterias.com/gb/batteries-for-truck) → [TUDOR](https://baterias.com/gb/tudor) - **Canonical URL**: https://baterias.com/gb/battery-tudor-tj165a1-165ah-850a - **Language**: en-GB - **Brand**: TUDOR - **Reference**: BCOM-TUDOR-TJ165A1 - **EAN**: 3661024055512 - **MPN**: TJ165A1 - **Price**: 691,70 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | TUDOR | | Reference | TJ165A1 | | Model | TUDOR START PRO (HD) | | Voltage (V) | 12 V | | Largo | 354 mm | | Ancho | 241 mm | | Alto | 285 mm | | Tecnología | Lead-acid | | EAN | 3661024055512 | | Terminal layout | 6 | | Cold cranking amps (EN) | 850 A | | Capacity (C20) | 165 Ah (c20) | ## Quick description **Tudor TJ165A1 12V 165Ah 850A** is an SHD (Super Heavy Duty) truck battery for intensive professional use. Vibration-resistant, withstands long cold-diesel cranks and deep discharges during parking with active loads (tachograph, refrigeration, heater). ## Why this truck battery? - **True Heavy Duty** built for intensive professional use - **Long cold-diesel cranks** reliable even in extreme cold - **Powers services at idle** tachograph, heater and lights with engine off 🔌 Voltage 12 V ⚡ Capacity 165 Ah C20 🔋 Cold cranking 850 A EN-1 📏 Dimensions 354×241×285 mm ⚙️ Technology Lead-acid ⚖️ Weight 45,3 kg 🏷️ Model TUDOR START PRO (HD) ## Description ## Truck battery Tudor TJ165A1 Start PRO (Hd) 165Ah 850A 12V 12*V* Voltage 165*Ah* Capacity 850*A* Cold cranking 45.30*kg* Weight The **Tudor TJ165A1** with conventional lead-acid technology delivers **165 Ah** at **12 V** and **850 A** of cold cranking current (EN): what trucks, buses, tractors and heavy machinery demand. It replaces the original battery without adaptation in trucks with a 354 × 241 × 285 mm format: same 165 Ah capacity. - Powerful cold cranking for large-displacement diesel engines. - Designed for 24 V installations with two batteries in series. - Conventional lead-acid: the most proven and economical technology. - Heavy Duty construction for intensive professional use. ### What the Tudor TJ165A1 is for Designed for trucks, buses, tractors and heavy machinery, the Tudor TJ165A1 withstands constant chassis vibration and discharges during stops with active loads. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 45.30 kg. ### The Tudor TJ165A1: Start PRO (Hd) range and conventional lead-acid technology Within the Tudor catalogue, the **Start PRO (Hd)** series groups the references designed for this use. The TJ165A1 is the 165 Ah model of that family, with the same performance as its siblings in other sizes. 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. ### Size, terminals and hold-down of the Tudor TJ165A1 The Tudor TJ165A1 is made in the 354 × 241 × 285 mm format and weighs 45.30 kg. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters. ### 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. ### Usage and maintenance tips Keep the terminals clean and tight and the battery firmly secured against chassis vibration. During rest stops with active loads, avoid repeated deep discharges: they shorten the life of any starter battery. ### Manufacturer's warranty The Tudor TJ165A1 comes with the **manufacturer's official warranty** against manufacturing defects. An important note for commercial vehicles: most trucks use **two batteries connected in series** (24 V installation). If you replace only one, the new battery works alongside the old one, which has already lost capacity; that imbalance shortens its life and the manufacturer may treat it as misuse. Always replace **both at the same time**. ### Shipping, delivery and returns 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 ### How is the Tudor TJ165A1 battery installed in the vehicle? In most trucks 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 our blog. 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 trucks with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How many years does this battery last? Expected lifespan of the Tudor TJ165A1 is 4 to 6 years in regular truck use without Start-Stop. 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 TJ165A1 battery? Dimensions (length × width × height) are 354×241×285 mm — also written as 354x241x285 mm — following the European DIN standard. Always measure the space in your truck before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Is the TJ165A1 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 TJ165A1 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Tudor TJ165A1? 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 trucks. 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 — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-25*