# Lawnmower battery Fulbat 12N18-4A 18V 18.9Ah 170A ![Lawnmower battery Fulbat 12N18-4A 18V 18.9Ah 170A](https://baterias.com/6159-home_default/battery-fulbat-12n18-4a-18v-18-9ah-170a.jpg) > Fulbat 12N18-4A lawnmower battery 18V 18.9Ah 170A. Lawn & Garden DRY range. Dimensions 205×90×162 mm, + terminal on the left. 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-12n18-4a-18v-18-9ah-170a - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-12N18-4A - **MPN**: 12N18-4A - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT Lawn & Garden DRY | | Voltage (V) | 12 V | | Largo | 205 mm | | Ancho | 90 mm | | Alto | 162 mm | | Tecnología | Lead-acid | | Terminal layout | Positive left | | Cold cranking amps (EN) | 170 A | | Capacity (C20) | 18.9 Ah | | Capacity (C10) | 18 Ah (c10) | ## Quick description **Fulbat 12N18-4A 18V 18Ah 170A** 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 18 V ⚡ Capacity 18 Ah C20 🔋 Cold cranking 170 A EN-1 📏 Dimensions 205×90×162 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the left 🏷️ Model FULBAT Lawn & Garden DRY #️⃣ Mfr. reference 12N18-4A ## Description ## Lawn mower battery Fulbat 12N18-4A 18.9Ah 170A 12V 12*V* Voltage 18.9*Ah* Capacity 170*A* Cold cranking The **Fulbat 12N18-4A** battery is rated at **12 V**, **18.9 Ah** and **170 A** of cold cranking current (EN) and is designed for ride-on mowers, tillers and garden machinery. It replaces the original battery without adaptation in ride-on mowers with a 205 × 90 × 162 mm format: same 18.9 Ah capacity and the positive terminal on the left. - Conventional lead-acid: the most proven and economical technology. - Reliable starting after months of winter storage. - Compact format for small trays. - Good tolerance to self-discharge. ### What the Fulbat 12N18-4A is for With 18.9 Ah, the Fulbat 12N18-4A starts ride-on mowers, tillers and garden machinery and copes with garden-engine vibration. ### Dimensions, polarity and mounting In terms of format, the Fulbat 12N18-4A measures 205 × 90 × 162 mm (length × width × height). 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. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Technology inside the Fulbat 12N18-4A The 12N18-4A 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. Conventional lead-acid is the benchmark against which other technologies are compared: good cranking current, great tolerance to alternator charging and the best price per amp-hour. ### How to make it last longer Check the voltage before the first start of the season and clean the terminals. On batteries with filler caps, check the electrolyte level and top up only with distilled water. ### Official warranty The Fulbat 12N18-4A 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. ### 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 is the Fulbat 12N18-4A 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. ### How many years does this battery last? Expected lifespan of the Fulbat 12N18-4A 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 dimensions of the Fulbat 12N18-4A battery? Dimensions (length × width × height) are 205×90×162 mm — also written as 205x90x162 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 12N18-4A 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 12N18-4A typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the 12N18-4A 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 2015. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-09*