# Lawnmower battery Fulbat FL-ST03 25.2V 2.6Ah Li-Ion ![Lawnmower battery Fulbat FL-ST03 25.2V 2.6Ah Li-Ion](https://baterias.com/6273-home_default/battery-fulbat-fl-st03-25-2v-2-6ah.jpg) > Fulbat FL-ST03 lawnmower battery 25.2V 2.6Ah Li-Ion. Robot Mower range. Dimensions 144×76×38 mm. For garden machinery. **Category:** [Lawnmower Batteries](https://baterias.com/gb/lawnmower-batteries) → [FULBAT](https://baterias.com/gb/fulbat) - **Canonical URL**: https://baterias.com/gb/battery-fulbat-fl-st03-25-2v-2-6ah - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FL-ST03 - **MPN**: FL-ST03 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT Robot Mower | | Voltage (V) | 25.2 V | | Largo | 144 mm | | Ancho | 76.96 mm | | Alto | 38 mm | | Tecnología | Li-Ion | | Capacity (C20) | 2.6 Ah | | Energy (Wh) | 65.52 Wh | ## Quick description **Fulbat FL-ST03 25V 2Ah** is a starter battery for lawnmowers and garden machinery, sized to crank reliably after months of storage. ### Why this lawnmower battery? - **Same JIS reference** as your bike's original — fits first time - **Sealed and ready to use** no acid handling, no refills - **Survives winter storage** holds charge through long off-season 🔌 Voltage 25 V ⚡ Capacity 2 Ah C20 📏 Dimensions 144×76×38 mm ⚙️ Technology LI-ION 🏷️ Model FULBAT Robot Mower #️⃣ Mfr. reference FL-ST03 ## Description ## Lawn mower battery Fulbat FL-ST03 2.6Ah 25.2V 25.2*V* Voltage 2.6*Ah* Capacity With **2.6 Ah**, the **Fulbat FL-ST03** starts ride-on mowers, tillers and garden machinery after months of storage. Measuring 144 × 76 × 38 mm, it is the direct replacement for ride-on mowers fitted from the factory with a 2.6 Ah battery of this format. - Resistant to garden-engine vibration. - Sealed and maintenance-free. - Reliable starting after months of winter storage. - Compact format for small trays. ### What the Fulbat FL-ST03 is for With 2.6 Ah, the Fulbat FL-ST03 starts ride-on mowers, tillers and garden machinery and copes with garden-engine vibration. ### Size, terminals and hold-down of the Fulbat FL-ST03 It has external dimensions of 144 × 76 × 38 mm. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### Why choose Fulbat batteries French brand Fulbat is a European reference in motorcycle, garden and leisure batteries: compact ranges, clear JIS codes and a consistent quality that workshops know well. We guarantee that every Fulbat arrives new, charged and with the manufacturer's full warranty. ### Technology inside the Fulbat FL-ST03 The FL-ST03 is one of the Fulbat references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue. ### Usage and maintenance tips Disconnect or remove the battery over winter and give it a maintenance charge before storing it. Check the voltage before the first start of the season and clean the terminals. ### Official warranty The Fulbat FL-ST03 comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you. ### Delivery times and returns Order **before [[ks:cutoff]]** 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 **[[ks:return_days]] 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 change this battery step by step? 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. ### How long does the Fulbat FL-ST03 battery last? Expected lifespan of the Fulbat FL-ST03 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 FL-ST03 model? Dimensions (length × width × height) are 144×77×38 mm — also written as 144x77x38 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 Fulbat FL-ST03 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 FL-ST03 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. ## 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 · 2026-10-03*