# Truck battery Fulmen FG1250 12V 125Ah 760A ![Truck battery Fulmen FG1250 12V 125Ah 760A](https://baterias.com/3722-home_default/battery-fulmen-fg1250-12v-125ah-760a.jpg) > Fulmen FG1250 truck battery 12V 125Ah 760A. StartPRO range. Dimensions 349Γ—175Γ—285 mm, + terminal on the right. For heavy-duty fleets. **Category:** [Truck Batteries](https://baterias.com/gb/batteries-for-truck) β†’ [Fulmen](https://baterias.com/gb/fulmen) - **Canonical URL**: https://baterias.com/gb/battery-fulmen-fg1250-12v-125ah-760a - **Language**: en-GB - **Brand**: Fulmen - **Reference**: BCOM-FULMEN-FG1250 - **EAN**: 3661024045407 - **MPN**: FG1250 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULMEN | | Reference | FG1250 | | Model | FULMEN StartPRO | | Voltage (V) | 12 V | | Largo | 349 mm | | Ancho | 175 mm | | Alto | 285 mm | | Peso | 29.5 kg | | TecnologΓ­a | Lead-acid | | EAN | 3661024045407 | | Terminal layout | Positive terminal on the right | | Hold down | B00 | | Cold cranking amps (EN) | 760 A | | Capacity (C20) | 125 Ah (c20) | | Case type | D03 | ## Quick description **Fulmen FG1250 12V 125Ah 760A** 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 πŸ”Œ Voltage 12 V ⚑ Capacity 125 Ah C20 πŸ”‹ Cold cranking 760 A EN-1 πŸ“ Dimensions 349Γ—175Γ—285 mm βš™οΈ Technology Lead-acid 🧭 Polarity Positive on the right βš–οΈ Weight 29,5 kg 🏷️ Model FULMEN StartPRO ## Description ## Truck battery Fulmen FG1250 StartPRO 125Ah 760A 12V 12*V* Voltage 125*Ah* Capacity 760*A* Cold cranking 29.50*kg* Weight With **125 Ah** and **760 A** of cold cranking current (EN), the **Fulmen FG1250** from the **StartPRO** range is built for professional use in trucks, buses, tractors and heavy machinery. It measures 349 Γ— 175 Γ— 285 mm and the positive terminal on the right, the format sought by anyone replacing a 125 Ah battery in trucks. - Designed for 24 V installations with two batteries in series. - Powerful cold cranking for large-displacement diesel engines. - Heavy Duty construction for intensive professional use. - Conventional lead-acid: the most proven and economical technology. ### What the Fulmen FG1250 is for The Fulmen FG1250 is designed for trucks, buses, tractors and heavy machinery. In 24 V installations with two batteries in series, replace both at the same time to avoid imbalance. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 29.50 kg and B00 hold-down. ### Will it fit your current battery tray? It has external dimensions of 349 Γ— 175 Γ— 285 mm and weighs 29.50 kg. The positive terminal on the right 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 B00 hold-down, 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. ### Why choose Fulmen batteries With more than a century of history, Fulmen offers complete ranges for cars, trucks, motorcycles and leisure with the industrial quality of the Exide group. All the Fulmen batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### The Fulmen FG1250: StartPRO range and conventional lead-acid technology The FG1250 is part of the Fulmen **StartPRO** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. 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. ### How to make it last longer In 24 V installations, check periodically that both batteries show the same voltage; an imbalance means one is failing. On batteries with filler caps, check the electrolyte level and top up only with distilled water. ### Warranty and coverage The Fulmen FG1250 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 [[ks:cutoff]]**: 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 **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### How do I fit the FG1250 model in my truck? 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On trucks with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Fulmen FG1250 battery last? Expected lifespan of the Fulmen FG1250 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 Fulmen FG1250 battery? Dimensions (length Γ— width Γ— height) are 349Γ—175Γ—285 mm β€” also written as 349x175x285 mm β€” 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 FG1250 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FG1250 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Fulmen FG1250? 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 β€” 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 J1](https://baterias.com/gb/battery-varta-j1-12v-125ah-720a) - [TUDOR TF1420](https://baterias.com/gb/battery-tudor-tf1420-142ah-850a) - [Q-battery BATTERY-12SEM-135](https://baterias.com/gb/battery-q-battery-12sem-135-12v-135ah) - [Q-battery BATTERY-12TTB-130](https://baterias.com/gb/battery-q-battery-12ttb-130-12v-130ah) - [EXIDE EF1420](https://baterias.com/gb/battery-exide-ef1420-12v-142ah-850a) - [EXIDE EG1250](https://baterias.com/gb/battery-exide-eg1250-12v) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-04*