Fulbat FL-HU03 · Lawnmower battery 18V 4Ah Li-Ion
Lawnmower battery Fulbat FL-HU03 18V 4Ah Li-Ion images
Specifications
| Brand | FULBAT |
|---|---|
| Part number | FL-HU03 |
| Voltage (V) | 18V |
| Capacity (C20) | 4Ah |
| Technology | Li-Ion |
| Length | 146.20mm |
| Width | 67.60mm |
| Height | 38.80mm |
| Model | FULBAT Robot Mower |
This product is priced on demand to offer you the best available price at all times.
Please contact us to request a quote and we will inform you about availability and the best price on the entire website, as well as the delivery time.
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Fulbat FL-HU03 18V 4Ah is a compact garden battery: strong cranking reserve and good tolerance to long idle periods between seasons.
Why this lawnmower battery?
- Same JIS referenceas your bike's original — fits first time
- Sealed and ready to useno acid handling, no refills
- Survives winter storageholds charge through long off-season
Where it fits: the Fulbat FL-HU03 is one of our lawnmower batteries, belongs to our Fulbat batteries and by capacity it sits among our 4Ah batteries.
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Lawn mower battery Fulbat FL-HU03 4Ah 18V
The Fulbat FL-HU03 battery is rated at 18 V, 4 Ah and is designed for ride-on mowers, tillers and garden machinery. It replaces the original battery without adaptation in ride-on mowers with a 146 × 67 × 38 mm format: same 4 Ah capacity.
- Reliable starting after months of winter storage.
- Compact format for small trays.
- Sealed and maintenance-free.
- Resistant to garden-engine vibration.
What the Fulbat FL-HU03 is for
With 4 Ah, the Fulbat FL-HU03 starts ride-on mowers, tillers and garden machinery and copes with garden-engine vibration.
Technology inside the Fulbat FL-HU03
The FL-HU03 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.
Size, terminals and hold-down of the Fulbat FL-HU03
In terms of format, the Fulbat FL-HU03 measures 146 × 67 × 38 mm (length × width × height). 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.
What Fulbat does differently
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.
How to make it last longer
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.
Manufacturer's warranty
The Fulbat FL-HU03 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.
When you get it and how to return it
Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 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 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.
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ReferenceBCOM-FULBAT-FL-HU03
Data sheet
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BrandFULBAT
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ModelFULBAT Robot Mower
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Voltage (V)18V
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Length146.20mm
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Width67.60mm
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Height38.80mm
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TechnologyLi-Ion
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Capacity (C20)4Ah
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Energy (Wh)72Wh
Specific References
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MPNFL-HU03
Other 4Ah batteries
We stock 21 models of 4 Ah to compare by price, technology and cold cranking: see all 4Ah batteries.
Recommended accessories
Frequently asked questions
How is the Fulbat FL-HU03 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 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.
How long does the Fulbat FL-HU03 battery last?
Expected lifespan of the Fulbat FL-HU03 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-HU03 model?
Dimensions (length × width × height) are 146×68×39 mm — also written as 146x68x39 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-HU03 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-HU03 typically fits a wide range of European vehicles thanks to its standard DIN case format.
What are the equivalents of the FL-HU03 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.
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