# Lawnmower battery Fulbat FL-RM03 25.6V 6.6Ah LiFePO4 ![Lawnmower battery Fulbat FL-RM03 25.6V 6.6Ah LiFePO4](https://baterias.com/6284-home_default/battery-fulbat-fl-rm03-25-6v-6-6ah.jpg) > Fulbat FL-RM03 lawnmower battery 25.6V 6.6Ah LiFePO4. Robot Mower range. Dimensions 216×56×79 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-rm03-25-6v-6-6ah - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FL-RM03 - **MPN**: FL-RM03 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT Robot Mower | | Voltage (V) | 25.6 V | | Largo | 216 mm | | Ancho | 56 mm | | Alto | 79 mm | | Tecnología | LiFePO4 | | Capacity (C20) | 6.6 Ah | | Energy (Wh) | 168.96 Wh | ## Quick description **Fulbat FL-RM03 25V 6Ah** is a compact garden battery: strong cranking reserve and good tolerance to long idle periods between seasons. ## 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 6 Ah C20 📏 Dimensions 216×56×79 mm ⚙️ Technology LIFEPO4 🏷️ Model FULBAT Robot Mower #️⃣ Mfr. reference FL-RM03 ## Description ## Lawn mower battery Fulbat FL-RM03 6.6Ah 25.6V 25.6*V* Voltage 6.6*Ah* Capacity With **6.6 Ah**, the **Fulbat FL-RM03** starts ride-on mowers, tillers and garden machinery after months of storage. It replaces the original battery without adaptation in ride-on mowers with a 216 × 56 × 79 mm format: same 6.6 Ah capacity. - LiFePO4 lithium: minimal weight and almost zero self-discharge. - Reliable starting after months of winter storage. - Compact format for small trays. - Good tolerance to self-discharge. ### What the Fulbat FL-RM03 is for The Fulbat FL-RM03 is designed for ride-on mowers, tillers and garden machinery. After winter, a full charge before the first start avoids surprises. ### Will it fit your current battery tray? It has external dimensions of 216 × 56 × 79 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. ### Technology inside the Fulbat FL-RM03 Fulbat builds the FL-RM03 to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position. LiFePO4 chemistry is the safest of the lithium batteries: thermally stable, cobalt-free and good for thousands of cycles, protected by its electronic management system. ### What Fulbat does differently Fulbat has manufactured in France since 1978 and specialises in motorcycles and light vehicles. Its catalogue is short and clear, covers almost the whole fleet and works only with sealed, leak-free batteries. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Manufacturer's warranty The Fulbat FL-RM03 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. ### How to make it last longer Check the voltage before the first start of the season and clean the terminals. Disconnect or remove the battery over winter and give it a maintenance charge before storing it. ### Delivery times and returns 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 ### 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 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. ### What is the service life of the FL-RM03 model? Expected lifespan of the Fulbat FL-RM03 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-RM03 model? Dimensions (length × width × height) are 216×56×79 mm — also written as 216x56x79 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 FL-RM03 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 FL-RM03 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the FL-RM03 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 — 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 · 2026-10-19*