The interesting question is what happens when the battery dies · review
SwitchBot states a next-generation motor, a full metal housing half as thick as its predecessor, up to eighteen unlocking methods with the Matter hub and touchscreen keypad, and a rechargeable main battery quoted at up to nine months.
The conclusion A full metal body stated at half the thickness, sold here with its touchscreen keypad. Add the Hub Mini before comparing, if the methods that depend on it matter to you.
Retrofit locks are usually judged on features. This one is worth judging on its shape.
A retrofit lock sits on the inside face of the door, over the thumbturn. That space is often occupied — by a chain, a mailbox flap, a handle, or by the door simply not having enough stile to spare. SwitchBot states a full metal housing half the thickness of the previous generation, and on a narrow door that is the difference between fitting and returning it.
The figure includes every combination available with the Matter-capable Hub Mini and the touchscreen keypad. This listing includes the keypad, so fingerprint and passcode; the hub is not in it, and some of the eighteen methods depend on it. In daily use a household picks one method and one fallback.
Up to nine months on a rechargeable main battery, stated without the daily cycle count that figure assumes. SwitchBot adds a backup battery that takes over while the main one charges, so the lock keeps opening. The last resort is the retrofit itself: the original cylinder and key still open the door when everything electronic has stopped.
A door with awkward clearance, and an owner who will actually use more than one unlocking method.
Not found on the American Amazon store, where the buy link falls back to a local search rather than to a page that does not exist.
Prices and availability are what Keepa reported on the date this page was updated; both move.
| Type | Retrofit — mounts over the existing thumbturn |
|---|---|
| Body | Full metal, 50% slimmer than the previous generation, stated by SwitchBot |
| Access | Up to 18 methods with Matter hub and touchscreen keypad |
| Power | Rechargeable main battery, up to 9 months stated; backup battery takes over while it charges |
| Alerts | Real-time door and lock status, unlocked-door warnings |
| Locking | Magnetic automatic locking |
| Speed | Unlocks in 1.75 s at 20 dB, stated by SwitchBot |
| Fingerprints | Stored locally |
| Installation | Tool-free, no drilling; magnetic quick release; 3 wood-grain covers supplied |
| Compatibility | Apple Home via Matter, Alexa, Google, stated by SwitchBot |
| Amazon reference | B0F2HLJCDR |
| EAN | 0810150544176 |
Two or three are. The number is a marketing count of every combination — app, keypad, fingerprint, card, voice, geofence and so on — and most households settle on one everyday method and one fallback. What matters is that the fallback works when the network is down and the phone is flat, which on any retrofit lock means the original key.
On some doors, yes. Retrofit locks sit proud of the inside face and can foul a door chain, a mailbox flap or a handle. A housing half the thickness is the difference between fitting and not fitting on a narrow stile.
The touchscreen keypad is in this listing’s title, so fingerprint and passcode are included. The Matter-capable Hub Mini is not, and some of the eighteen methods depend on it. Add it to the price before comparing with the other locks in this hub.
7.8/ 10
A full metal body stated at half the thickness, sold here with its touchscreen keypad. Add the Hub Mini before comparing, if the methods that depend on it matter to you.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom. Listed is not the same as in stock — availability changes daily.
Details checked on September 2, 2026.
A door where the indoor unit needs to be as unobtrusive as possible, on a household that likes options.
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Matter over Thread · Apple Home Key · rechargeable Li-ion, 6 months stated · no drilling
A retrofit lock with native Matter over Thread, so it joins Apple Home, Google Home and Alexa without a vendor bridge. Aqara states Apple Home Key support, a rechargeable battery quoted at up to six months, and a quiet unlocking mode.
Best for: A household already running Matter or Apple Home, that wants the lock to be part of it rather than another app.
Retrofit · built-in Wi-Fi, no bridge · Matter over Thread · charged at the door · months per charge
Nuki's fifth-generation lock puts Wi-Fi inside the unit, so remote access needs no bridge or hub, and adds Matter alongside Bluetooth. The battery charges at the door with the supplied cable rather than coming off it.
Best for: A household that wants remote access without adding another box to the hallway.
Retrofit · fingerprint, app and Bluetooth · magnetic auto-lock · 6 cells · no drilling
A retrofit lock that mounts over an existing cylinder with no drilling and no cylinder change. Signstek states fingerprint, app and Bluetooth access, magnetic auto-locking, and six batteries; the existing key still works from outside.
Best for: A first smart lock, and particularly a rented apartment where nothing may be altered.
