Kronobat PE-65-EFB Premium EFB · Start-Stop battery 65Ah 650A

Yes, it is EFB: a flooded lead-acid battery whose plates carry reinforcing additives (what is an EFB). It withstands more cycles than a conventional battery but fewer than an AGM, and it is fitted to cars with basic Start-Stop, without regenerative braking. It is more affordable than an equivalent AGM.

Yes, the EFB technology of the PE-65-EFB is built for Start-Stop. EFB batteries cover basic Start-Stop (no regenerative braking). 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. Once fitted it is ready to go; registering it via OBD, advisable on most modern models, lets the alternator charge with the optimum profile.

With a 10 mm spanner, swapping in the Kronobat PE-65-EFB 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. If the car has Start-Stop or BMS: a) the technology must match the original (AGM or EFB) or be higher, because a conventional battery would fail within months; b) undo the negative cable at its nut, leaving the IBS sensor in place; c) it is advisable to register the battery via OBD so the alternator applies the proper charging profile. What matters most is the terminal order: removing, negative (−) before positive (+); refitting, positive (+) before negative (−). In between, with the engine off and the key out, release the clamp and fit the new battery the same way round as the original, positive on the right (polarity). For the detail, read our guide to replacing the car battery and, if in doubt, the owner's handbook or a main dealer.

There is no exact figure: for a battery such as the Kronobat PE-65-EFB (EFB), a reasonable guide is 4 to 6 years in basic Start-Stop car use. Actual lifespan varies with climate (cold starts, heat evaporating the electrolyte), with usage and short journeys, with the condition of the alternator and charging system, with power draw while parked and with maintenance; the type of car and Start-Stop also count.

Length × width × height: 232x175x225 mm. Height is measured to the top of the terminals. Measure your car's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close.

It has the positive on the right (polarity). Put it in front of you, terminals towards you: the post with the red ring and the + sign is the positive. A change of polarity from the original means longer cables or a reconfigured system and can cause a short circuit: check it before ordering.

The quickest way is to enter your number plate in the finder: DGT/DVLA/KBA detect model and engine. You can also look at the "Compatible vehicles" tab, verified by our technical team, or send us make, model, engine and year on WhatsApp; we answer during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). If our table and the car handbook disagree, go with what the manufacturer says.

See the "Equivalents" section of this page for the recommended options at the same performance level. Mind the technology: in Start-Stop cars an EFB is not swapped for a conventional battery. A battery interchangeable with the Kronobat PE-65-EFB must match it on dimensions (232×175×225 mm), polarity (positive on the right), capacity (65 Ah) and cranking current (650 A).

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 PE-65-EFB is an EFB. Thicker grids plus carbon and polyethylene additives in the plates: that is what sets an EFB apart from a conventional flooded battery. The result is more cycles and more resistance to deep discharges, without reaching AGM level. 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.

The alternator detects the new battery and adapts the charge automatically, so on most cars it is not compulsory. Even so, it is advisable to register it via OBD so charging is optimum from the first minute and the battery lasts longer, particularly on BMW, Mercedes, Audi, Volvo or Land Rover, with more sophisticated BMS. Any workshop with an OBD scanner does it in a few minutes; DIY, with VCDS or Carista (VAG group), Bimmercode (BMW) or iCarsoft. Even if you do not register the Kronobat PE-65-EFB, the car will start correctly; the profile adjusts within a few days.