Fulbat SLA12-22 Lawn & Garden SLA · Battery 23.1Ah 210A AGM

Yes, it is AGM. In an AGM battery such as the SLA12-22, the electrolyte is not free but absorbed in a glass-fibre mat inside a sealed lead-acid battery. It is the technology required by trucks with advanced Start-Stop and regenerative braking. It withstands more cycles than a conventional battery and copes better with heat.

Yes. It is a AGM battery of 23.1 Ah, designed for vehicles with Start-Stop. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. It works once fitted; on most modern trucks, registering it via OBD is advisable so the alternator applies the optimum charging profile. As a rule: EFB for basic Start-Stop, AGM when there is also regenerative braking (more cycles); in any case, what the truck manufacturer specifies.

Estimated lifespan of the Fulbat SLA12-22: 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. It can vary considerably with usage (short or long journeys), temperature, the condition of the alternator and charging system, power drawn with the engine off and maintenance, plus the truck itself and Start-Stop. Cold demands more at every start and intense heat evaporates the electrolyte.

Before buying, measure the space in your truck: one extra millimetre can stop the hold-down clamp from closing. The Fulbat SLA12-22 takes up 182×77×168 mm (length, width and height, terminals included).

The SLA12-22 has the positive on the right: that is its polarity. Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on. Compare it with the battery you are replacing: if it does not match, cables must be lengthened or the system reconfigured, with a risk of short circuit.

Not sure? Try your number plate in the finder (DGT/DVLA/KBA detect model and engine) or the "Compatible vehicles" tab, checked by our technical team; if your truck is not there, send us make, model, engine and year on WhatsApp and we will 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 Fulbat SLA12-22 must match it on dimensions (182×77×168 mm), polarity (positive on the right), capacity (23.1 Ah) and cranking current (210 A). The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop trucks an EFB should not be replaced with a conventional battery.

It is the recommended choice for advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop) and copes better than an EFB with tilting, vibration and extreme temperatures. The absorbent glass-fibre mat of an AGM retains the electrolyte, so it cannot leak and withstands considerably more cycles than a conventional battery. Capacity of the SLA12-22: 23.1 Ah.

Advisable, yes; essential, on most trucks, no. Registering it via OBD makes the alternator charge with the optimum profile from the first minute and extends battery life, which matters most on brands with sophisticated BMS such as BMW, Mercedes, Audi, Volvo or Land Rover. A workshop only needs an OBD scanner and a few minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. Even if you do not register the Fulbat SLA12-22, the truck will start correctly; the profile adjusts within a few days.