Nuki Smart Lock Pro (4th generation)

The old Pro has one advantage worth keeping

Fourth-generation Pro combines Nuki's older cylinder motor with built-in Wi-Fi and a removable rechargeable Power Pack. Its large lower battery compartment looks less tidy than the newer round Pro, but it gives the owner a battery that can come out separately from the lock.

That is a meaningful ownership benefit. A tired pack can be replaced, and charging does not require removing the whole motor. The fifth-generation Pro uses a built-in battery that Nuki directs owners to support to service.

If this lock already fits the door and gives the household dependable entry, smaller hardware alone is a weak reason to spend again. We have not measured motor noise, battery endurance or unlock reliability; this assessment is about the product's design, costs and current options.

€289 is the wrong starting point for a new purchase

Nuki's euro legacy page listed the fourth-generation Pro at €289 on September 10, 2026. The fifth-generation Pro was €269. The older model costs €20 more at those references while retaining the large body and single-speed motor.

The current Pro offers three motor modes, including a gentler option for slower operation with reduced noise. Choose it if the visible bulk or motor behaviour is what you want to improve. Both generations can keep a suitable existing cylinder, so choosing the newer Pro does not automatically mean replacing the keys.

The cheaper Go also deserves comparison. Its €149 lock, €49 Nuki Remote Access upgrade and €49 Power Pack total €247. That is €42 below the old Pro listing for a package with replaceable rechargeable power and remote Nuki access. Go keeps the older bulky shape, but costs much less when bought without those extras.

Legacy listing prices do not establish a good clearance offer. Compare the delivered price, included pack and actual condition rather than treating the word Pro as proof of better value.

Check the Power Pack as carefully as the motor

The included pack charges through USB-C, either removed or fitted to the lock. It can supply the motor while charging. Keeping a spare pack can suit a busy door better than waiting beside a charging cable.

Older packs have a detail that matters when buying used: Nuki says units bought before July 2024 may not charge successfully from modern USB Power Delivery chargers. The original USB-A-to-USB-C cable and a suitable ordinary USB supply may be needed. A charger mismatch should not immediately be mistaken for a dead pack.

Nuki's current support table estimates seven to nine months over Thread and six months over built-in Wi-Fi for this generation with a Power Pack. These are manufacturer estimates, not our test results or a promise for an ageing battery. Door resistance, use and battery condition still matter.

Remote access is included, with several routes

Unlike the standard fourth-generation model, Pro includes Nuki remote access. Its built-in 2.4 GHz Wi-Fi can bring it online without a separate bridge or Thread hub. Matter control uses a suitable controller and Thread border router instead.

The older Pro also supports a Nuki Bridge. That can matter to an existing installation using the Bridge's local API: replacing hardware deserves more thought than simply seeing Matter on both boxes. There is no need to buy a Bridge just to get ordinary remote access on this Pro.

Included Nuki access is useful for managing guest permissions while away. Someone who only wants a lock button in their existing Matter platform has less reason to pay a Pro premium: the cheaper Go provides that integration without its optional Nuki Remote Access purchase.

Wallet entry does not require a new Pro

The fourth-generation Pro supports Keypad 2 NFC, including eligible Apple or Samsung wallet entry with the required phones and ecosystem hardware. That accessory was €179. Fingerprint and PIN entry also come from a separate keypad, not the motor's indoor button.

If easier entry is the aim, compare the accessory before replacing the lock. If fingerprints already work well for everyone, keep the current keypad too.

For a used purchase, establish that it is the fourth-generation Pro: the similar-looking 3.0 Pro does not have the same native Matter path. Check that the Power Pack and required mounting pieces are included and that the existing cylinder remains usable from outside with an inside key inserted.

Keep a sound fourth-generation Pro for its replaceable power supply and the work it already saves. Buy one now only when a real discount or a specific existing integration outweighs the newer model's lower listed price and smaller body.