# Truck battery Exide EF1251 12V 125Ah 850A ![Truck battery Exide EF1251 12V 125Ah 850A](https://baterias.com/5525-home_default/battery-exide-ef1251-12v-125ah-850a.jpg) > Exide EF1251 truck battery 12V 125Ah 850A. Power Pro (HDX) range. Dimensions 349×175×285 mm, + terminal on the left. For heavy-duty fleets. **Category:** [Truck Batteries](https://baterias.com/gb/batteries-for-truck) → [EXIDE](https://baterias.com/gb/exide) - **Canonical URL**: https://baterias.com/gb/battery-exide-ef1251-12v-125ah-850a - **Language**: en-GB - **Brand**: EXIDE - **Reference**: BCOM-EXIDE-EF1251 - **EAN**: 3661024037952 - **MPN**: EF1251 - **Price**: 123,20 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | EXIDE | | Reference | EF1251 | | Model | EXIDE PowerPRO | | Voltage (V) | 12 V | | Largo | 349 mm | | Ancho | 175 mm | | Alto | 285 mm | | Peso | 31 kg | | Tecnología | Flooded | | EAN | 3661024037952 | | Terminal layout | Positive terminal on the left | | Terminal type | EN taper post | | Hold down | B0 | | Cold cranking amps (EN) | 850 A | | Capacity (C20) | 125 Ah (c20) | | Case type | D03 | ## Quick description **Exide EF1251 12V 125Ah 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 125 Ah C20 🔋 Cold cranking 850 A EN-1 📏 Dimensions 349×175×285 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the left ⚖️ Weight 31 kg 🏷️ Model EXIDE Power Pro (HDX) ## Description ## Truck battery Exide EF1251 PowerPRO 125Ah 850A 12V 12*V* Voltage 125*Ah* Capacity 850*A* Cold cranking 31*kg* Weight The **Exide EF1251 truck battery** is rated at **12 V**, **125 Ah** and **850 A** of cold cranking current (EN) from the **PowerPRO** range, and is prepared for trucks, buses, tractors and heavy machinery. It measures 349 × 175 × 285 mm and the positive terminal on the left, the format sought by anyone replacing a 125 Ah battery in trucks. - Heavy Duty construction for intensive professional use. - Conventional lead-acid: the most proven and economical technology. - Designed for 24 V installations with two batteries in series. - Powerful cold cranking for large-displacement diesel engines. ### What the Exide EF1251 is for With 125 Ah, the Exide EF1251 cranks large-displacement diesel engines in the cold and powers tachograph, fridge and heater during rest stops. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 31 kg, EN taper post terminals and B0 hold-down. ### Will it fit your current battery tray? It has external dimensions of 349 × 175 × 285 mm and weighs 31 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 B0 hold-down and EN taper post terminals, the system that anchors and connects it in the vehicle. 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. ### The Exide EF1251: PowerPRO range and conventional lead-acid technology The **PowerPRO** is the Exide range the EF1251 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. In a conventional battery the electrolyte is liquid and the lead plates are immersed in it. It is a mature, economical and easily recycled technology, ideal for starting vehicles in normal use. ### Exide: the maker behind the EF1251 Exide is one of the world's largest battery manufacturers and an original-equipment supplier to many car makers. Its European plants produce starter, industrial and leisure batteries under original-equipment quality controls. All the Exide batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Manufacturer's warranty The Exide EF1251 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**. ### Care and maintenance During rest stops with active loads, avoid repeated deep discharges: they shorten the life of any starter battery. In 24 V installations, check periodically that both batteries show the same voltage; an imbalance means one is failing. ### When you get it and how to return it Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### How is the Exide EF1251 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 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 trucks with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### What is the service life of the EF1251 model? Expected lifespan of the Exide EF1251 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 measurements of the EF1251 model? Dimensions (length × width × height) are 349×175×285 mm — also written as 349x175x285 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. ### Will the Exide EF1251 battery fit my truck? 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 EF1251 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which interchangeable batteries are there for this one? 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. ## Equivalent batteries - [VARTA J2](https://baterias.com/gb/battery-varta-j2-12v-125ah-720a) - [EXIDE EG1251](https://baterias.com/gb/battery-exide-eg1251-12v-125ah-760a) - [TUDOR TF1251](https://baterias.com/gb/battery-tudor-tf1251-12v-125ah-850a) - [TUDOR TG1251](https://baterias.com/gb/battery-tudor-tg1251-12v-125ah-760a) ## Reviews - **Average rating**: 4.77 / 5 (31 reviews) ## 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 --- *baterias.com — Automotive batteries · 2026-09-29*