# Truck battery Fulmen FD2103T 12V 210Ah 800A GEL ![Truck battery Fulmen FD2103T 12V 210Ah 800A GEL](https://baterias.com/3704-home_default/battery-fulmen-fd2103t-12v-210ah-800a.jpg) > Fulmen FD2103T truck battery 12V 210Ah 800A GEL. Endurance+PRO Gel range. Dimensions 518Γ—274Γ—240 mm, + terminal on the left. 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-fd2103t-12v-210ah-800a - **Language**: en-GB - **Brand**: Fulmen - **Reference**: BCOM-FULMEN-FD2103T - **EAN**: 3661024047265 - **MPN**: FD2103T - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULMEN | | Reference | FD2103 T | | Model | FULMEN Endurance+PRO Gel | | Voltage (V) | 12 V | | Largo | 518 mm | | Ancho | 274 mm | | Alto | 240 mm | | Peso | 66 kg | | TecnologΓ­a | GEL | | EAN | 3661024047265 | | Terminal layout | Positive terminal on the left | | Terminal type | 1 | | Hold down | B00 | | Cold cranking amps (EN) | 800 A | | Capacity (C20) | 210 Ah (c20) | | Case type | D06 | ## Quick description **Fulmen FD2103T 12V 210Ah 800A** is a professional battery for heavy commercial vehicles. Withstands constant chassis vibration, supports long cold-engine cranks and keeps auxiliary services running (tachograph, heater, refrigeration, GPS) during driver's mandatory rest stops. ## 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 210 Ah C20 πŸ”‹ Cold cranking 800 A EN-1 πŸ“ Dimensions 518Γ—274Γ—240 mm βš™οΈ Technology GEL 🧭 Polarity Positive on the left βš–οΈ Weight 66 kg 🏷️ Model FULMEN Endurance+PRO Gel ## Description ## Truck battery Fulmen FD2103T Endurance+PRO Gel 210Ah 800A 12V 12*V* Voltage 210*Ah* Capacity 800*A* Cold cranking 66*kg* Weight The **Fulmen FD2103T truck battery** is rated at **12 V**, **210 Ah** and **800 A** of cold cranking current (EN) from the **Endurance+PRO Gel** range, and is prepared for trucks, buses, tractors and heavy machinery. It replaces the original battery without adaptation in trucks with a 518 Γ— 274 Γ— 240 mm format: same 210 Ah capacity and the positive terminal on the left. - Powerful cold cranking for large-displacement diesel engines. - Designed for 24 V installations with two batteries in series. - GEL technology: gelled electrolyte, fully sealed and maintenance-free. - Heavy Duty construction for intensive professional use. ### What the Fulmen FD2103T is for The Fulmen FD2103T 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 66 kg, 1 terminals and B00 hold-down. ### Dimensions, polarity and mounting It has external dimensions of 518 Γ— 274 Γ— 240 mm and weighs 66 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 B00 hold-down and 1 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. ### What Fulmen does differently 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. We guarantee that every Fulmen arrives new, charged and with the manufacturer's full warranty. ### The Fulmen FD2103T: Endurance+PRO Gel range and GEL technology Within the Fulmen catalogue, the **Endurance+PRO Gel** series groups the references designed for this use. The FD2103T is the 210 Ah model of that family, with the same performance as its siblings in other sizes. A GEL battery is the choice when cycle resistance and safety matter most: no gases, no liquid and thousands of partial discharges in its lifetime. ### 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. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. ### Warranty and coverage The Fulmen FD2103T 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**. ### 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 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 ### Is the Fulmen FD2103T a GEL battery? What is GEL used for? Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger β€” max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years. ### How is the Fulmen FD2103T 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 (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 FD2103T battery last? Expected lifespan of the Fulmen FD2103T is 6 to 10 years in cyclic use (marine, caravan, solar) with controlled discharges. 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 FD2103T battery? Dimensions (length Γ— width Γ— height) are 518Γ—274Γ—240 mm β€” also written as 518x274x240 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. ### Does this 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FD2103T typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the FD2103T model? 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 - [EXIDE ED2103-T](https://baterias.com/gb/battery-exide-ed2103-t-12v-210ah-800a) - [EXIDE ED2103](https://baterias.com/gb/battery-exide-ed2103-12v-210ah-1050a) - [TUDOR TD2103](https://baterias.com/gb/battery-tudor-td2103-210ah-1050a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” automotive battery specialists since 2015. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-13*