Fulmen FL955 · Start-Stop battery 95Ah 800A EFB

Yes. The FL955 is an EFB (Enhanced Flooded Battery): flooded lead-acid reinforced with plate additives. For cycles it sits between a conventional battery and an AGM, and it costs less than an equivalent AGM; it is the technology for cars with basic Start-Stop, without regenerative braking.

EFB batteries cover basic Start-Stop (no regenerative braking). The Fulmen FL955 is EFB, so yes, it is designed for Start-Stop cars. If the car 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 cars registering it via OBD is advisable so the alternator adjusts its charging profile.

For the detail, read our guide to replacing the car battery and, if in doubt, the owner's handbook or a main dealer. With a 10 mm spanner, swapping in the Fulmen FL955 takes 15 to 30 minutes on most cars; if the battery sits in the boot or under a seat, allow up to twice as long. The right order: engine off and key out; disconnect the negative (−) first, then the positive (+); release the hold-down clamp, lift out the old battery and seat the new one in the same position (positive on the left), keeping the polarity; reconnect the positive (+) first and the negative (−) last. Start-Stop or BMS specifics: do not remove the IBS sensor on the negative terminal (just loosen the cable nut); after the swap, register the battery via OBD so the alternator charges with the right profile; and never step down in technology: if the car had AGM or EFB, the new one must be the same or better, as a conventional battery lasts only a few months.

As a rough estimate, the Fulmen FL955 typically lasts 4 to 6 years in basic Start-Stop car use; it is a guide figure, not a guaranteed period. What weighs most: temperature (cold makes starts harder and intense heat evaporates the electrolyte), frequent short trips, the condition of the alternator and charging system, power draw while parked and maintenance, not forgetting the type of car and Start-Stop.

The Fulmen FL955 takes up 306×173×222 mm (length, width and height, terminals included). Before buying, measure the space in your car: one extra millimetre can stop the hold-down clamp from closing.

Polarity of the Fulmen FL955: positive on the left. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Seen from the front, terminals towards you, the positive (+) is the post with the red ring.

Three routes: the "Compatible vehicles" tab on this page, with the vehicles verified by our technical team; your number plate in the finder, from which DGT/DVLA/KBA detect model and engine; and WhatsApp, with make, model, engine and year, during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The car manufacturer's specifications always take priority over our tables.

The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop cars an EFB should not be replaced with a conventional battery. A battery interchangeable with the Fulmen FL955 must match it on dimensions (306×173×222 mm), polarity (positive on the left), capacity (95 Ah) and cranking current (800 A).

The Tudor alternative that fits where the FL955 goes, with the same polarity. Compared with the FL955 it has the same Ah and cranking power. It costs €147.70 more. A straight swap with nothing to adapt; the difference is the price and the brand you prefer.

It is the verified Exide equivalent for the FL955 tray. Compared with the FL955 it has the same Ah and cranking power. It costs €140.70 more. Decide by price, brand preference and availability: both fit and crank the same.

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 FL955 is an EFB.

Advisable, yes; essential, on most cars, 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. Without registration the car starts normally; the alternator simply takes a few days to adjust the profile. A workshop only needs an OBD scanner and a few minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft.