Fulmen FX2253 EndurancePRO EFB · Truck battery 225Ah 1150A

Yes: the FX2253 (225 Ah) is an EFB, an evolution of the flooded lead-acid battery with additives that strengthen the plates. It goes into trucks with basic Start-Stop (no energy recovery when braking): more cycles than a conventional battery, fewer than an AGM, and cheaper than an equivalent AGM.

Yes. It is a EFB battery of 225 Ah, designed for vehicles with Start-Stop. EFB batteries cover basic Start-Stop (no regenerative braking). If the truck recovers energy when braking, AGM is recommended for its higher cycle count; for basic Start-Stop, EFB. The manufacturer's specification comes first. It needs nothing to work, though on most modern trucks registering it via OBD is advisable so the alternator adjusts its charging profile.

Most lorries, buses and tractors run on 24 V with two 12 V batteries connected in series. Always replace both at the same time and with the same model: if one is new and the other old, they become unbalanced and both last less.

Estimated lifespan of the Fulmen FX2253: 5 to 7 years in lorry use, even with high power draw while parked. Treat it as an approximate guide, as every case is different. Many factors play a part: how it is used (lots of short trips, for example), temperature (cold makes every start harder and intense heat evaporates the electrolyte), the condition of the alternator and charging system, power drawn with the engine off and maintenance, as well as the type of truck and whether it has Start-Stop.

The Fulmen FX2253 takes up 518×274×240 mm (length, width and height, terminals included). Before buying, measure the space in your truck: one extra millimetre can stop the hold-down clamp from closing.

The FX2253 has the positive on the left: that is its polarity. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on.

For your own vehicle: type your number plate into the finder (DGT/DVLA/KBA identify model and engine), check the "Compatible vehicles" tab below, listing vehicles verified by our technical team, or message us on WhatsApp with make, model, engine and year; we reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The truck manufacturer's specifications always take priority over our tables.

A battery interchangeable with the Fulmen FX2253 must match it on dimensions (518×274×240 mm), polarity (positive on the left), capacity (225 Ah) and cranking current (1150 A). See the "Equivalents" section of this page for the recommended options at the same performance level. Mind the technology: in Start-Stop trucks an EFB is not swapped for a conventional battery.

The EFB (Enhanced Flooded Battery) is a reinforced flooded battery: plates with carbon and polyethylene additives and thicker grids, giving it more cycles than a conventional one; for cycles and deep discharges it still sits below an AGM. Its place is basic Start-Stop without regenerative braking, fitted from new in, for example, Renault Energy TCe, Peugeot/Citroën PureTech, Fiat MultiAir, Hyundai/Kia ISG or Ford EcoBoost. EFB from the factory? Stay with EFB; AGM is optional and only a marginal improvement. AGM from the factory? Then fit an AGM, because an EFB would fall short. This FX2253 is an EFB.

It is not strictly necessary on most trucks, because the alternator detects the change and adapts the charge. The advisable step is to register it via OBD: the charging profile is optimum from the first minute and the battery lasts longer, especially on brands with sophisticated BMS (BMW, Mercedes, Audi, Volvo, Land Rover). Without registration the truck starts normally; the alternator simply takes a few days to adjust the profile. Any garage with an OBD scanner can do it in a few minutes. If you prefer to do it yourself: VCDS / Carista (VAG), Bimmercode (BMW) or iCarsoft.