The interesting question is what happens when the battery dies · review
The only Grade 2 lock on this shelf, at seventy-nine dollars — with a power-bank port and keys behind it.
The conclusion BHMA Grade 2 for seventy-nine dollars is the best-certified lock on this shelf and it undercuts every other fingerprint lock here — including Wyze's own Grade 3 Palm Lock at fifty dollars more. A half-second read behind tempered glass, eight cells in the box, a USB-C port that takes a power bank and keys behind that: both failure layers the hub above asks for. No door thickness or bore size is published, and the auto-lock is stated without an interval.
No door thickness. No bore size. No auto-lock interval.
And the numbering catches people out.
BHMA and ANSI grades run downwards. Grade 1 is the commercial standard. Grade 2 is better than Grade 3. Grade 3 is the residential baseline.
Four locks on this shelf publish a grade. This is the only Grade 2 — including against Wyze’s own Palm Lock, which is Grade 3 and costs fifty dollars more.
At seventy-nine dollars, the best certification per dollar on the shelf.
Key, and a port.
This shelf’s introduction: the purchase should be decided by what happens at zero battery — a key override, an emergency terminal that takes a power bank, or nothing at all.
Eight AA cells, included, for up to eight months. Then a USB-C port on the outside escutcheon that takes any power bank and runs the motor. Then keys.
The port is a way in, not a charger: the cells stay dead until replaced.
And it only works if the power bank is with you rather than inside the house. Which is why the buying tip says to keep a key outside too — Wyze supplies them.
Which is why it still works next year.
A fingerprint reader on a front door lives outdoors and gets used with grit on people’s fingers.
These locks rarely fail. They drift: the plastic window accumulates fine scratches, reads get unreliable, and within a year the household uses the keypad.
Scratch- and smudge-resistant tempered glass is the fix, and Wyze is the only maker on this shelf to say what its sensor window is made of.
On sale at around $79 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
| Grade | BHMA Grade 2, stated as BHMA2 — and it is the highest grade published on this shelf. BHMA numbering runs downwards, so Grade 1 is best and Grade 2 beats the Grade 3 certifications on three other locks here, including Wyze's own dearer Palm Lock. IP53 weather resistance is also stated |
|---|---|
| Failure path | Two published layers: eight AA cells giving up to 8 months, a USB-C port that lets any common power bank power the lock to unlock the door if the cells die, and physical backup keys as a guaranteed fallback. This shelf's introduction says the purchase should be decided on exactly this |
| Biometrics | A fingerprint scanner unlocking in 0.5 seconds behind scratch- and smudge-resistant tempered glass, with AI self-learning that improves recognition with every touch. Tempered glass over the sensor is the detail: a scratched plastic window is the usual cause of failed reads after a year |
| Credentials | Fingerprint, keypad code, the Wyze app over built-in Wi-Fi, a Wyze video doorbell live feed, and the physical keys. Up to 50 codes or fingerprints stored |
| Security | An anti-peep keypad allowing extra digits around the real PIN, plus auto-lock and tamper alarms — stated |
| Battery | 8 AA cells INCLUDED for up to 8 months of use, stated. Three locks on this shelf include their cells and one explicitly does not |
| Connection | Built-in Wi-Fi with no hub, and pairing with a Wyze video doorbell to unlock directly from the live feed after seeing who is there — a genuinely useful combination, and a Wyze-only one |
| Fitting | Not published. No door thickness range and no bore size appears |
| Auto-lock | Stated, with no interval or mechanism described — where one lock on this shelf uses a gyroscope and another publishes a 0–180 second range |
| Amazon reference | B0FD3WMV2T |
| EAN | 0810083475172 |
Yes, and the numbering catches people out: BHMA and ANSI grades run downwards, so Grade 1 is the commercial standard, Grade 2 is better than Grade 3, and Grade 3 is the residential baseline. Grade 2 means more cycles, more force resisted and more strikes survived in the test than Grade 3. Four locks on this shelf publish a grade and this is the only Grade 2 among them — including against Wyze's own Palm Lock, which is Grade 3 and costs fifty dollars more. At seventy-nine dollars that is the best certification-per-dollar here.
Because a fingerprint reader on a front door lives outdoors and gets used with grit on people's fingers. The commonest way these locks become annoying is not failure but drift: the plastic window over the sensor accumulates fine scratches, reads get less reliable, and within a year everybody is using the keypad instead. Scratch- and smudge-resistant tempered glass is the fix, and Wyze is the only maker on this shelf to say what the sensor window is made of. The AI self-learning is the software half of the same problem.
That is the whole point of it: the port is on the outside escutcheon, so you plug a power bank into the lock itself and it draws enough to run the motor and open the door. It is not a charger for the AA cells, which stay dead until replaced — it is a way in. Six locks on this shelf offer this, and it only works if the power bank is with you rather than inside the house. Which is why this shelf's buying tip says to keep a physical key somewhere outside the house as well, and Wyze supplies them.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Grade | Failure path | Credentials | Battery |
|---|---|---|---|---|---|
| WYZE WLCKB2 Auto-Lock Bolt v2, AI fingerprint, BHMA Grade 2 | $79 | BHMA Grade 2, stated as BHMA2 — and it is the highest grade published on this shelf. BHMA numbering runs downwards, so Grade 1 is best and Grade 2 beats the Grade 3 certifications on three other locks here, including Wyze's own dearer Palm Lock. IP53 weather resistance is also stated | Two published layers: eight AA cells giving up to 8 months, a USB-C port that lets any common power bank power the lock to unlock the door if the cells die, and physical backup keys as a guaranteed fallback. This shelf's introduction says the purchase should be decided on exactly this | Fingerprint, keypad code, the Wyze app over built-in Wi-Fi, a Wyze video doorbell live feed, and the physical keys. Up to 50 codes or fingerprints stored | 8 AA cells INCLUDED for up to 8 months of use, stated. Three locks on this shelf include their cells and one explicitly does not |
| eufy Security T85D2 Smart Lock C34, Apple Home, keyless entry | $80 | Not published. No BHMA grade and no IP rating, where the maker's own C220 on this shelf publishes Grade 3, IP53 and a temperature range | A physical key, and no emergency power terminal published. One layer rather than two, where six locks on this shelf offer both — and this shelf's introduction calls this the question that should decide the purchase | Four ways: the app, the keypad, a physical key, and voice through Alexa or Google Assistant. There is no fingerprint reader, which is the difference from the maker's C220 on this shelf | Up to 8 months on 8 AA cells BASED ON TYPICAL USAGE OF APPROXIMATELY 10 UNLOCKS PER DAY — stated. It is the only battery figure on this shelf with its assumption published, and the assumption is what makes the figure usable: a household of five going in and out all day will see considerably less, and a second home considerably more. Every other eight-month claim here is the same arithmetic with the condition removed |
| Sifely Fingerprint smart door lock with handle and keypad | $80 | Not published. No BHMA grade, no IP rating and no cycle count, where four locks on this shelf publish a grade and five an ingress rating | A physical key, one of the five ways in. No emergency power terminal is published — and with no battery life published either, the key is the only thing standing between the household and a locksmith | Five ways in: fingerprint, keypad, app, FOB or key. The FOB is unusual on this shelf and is the right credential for a cleaner or an elderly relative, since it needs no phone and no code to remember | NOT PUBLISHED. No cell type, no count, no runtime and no statement of whether cells are included — the only lock on this shelf to publish nothing at all about power, on a shelf whose own tag reads: the interesting question is what happens when the battery dies |
| Tapo DL100 smart Wi-Fi deadbolt, keyless tactile buttons | $60 | BHMA Grade 3 certification and an IP54 weatherproof rating against rain, dust and dirt — stated. IP54 is the highest ingress rating among the keypad locks on this shelf, where three others are IP53 | Both layers published: a USB-C port for emergency power and two backup keys. This shelf's introduction says this is the question that should decide the purchase | Up to 200 customisable codes on a backlit keypad, Bluetooth for nearby access, remote Wi-Fi through the app, voice commands with PIN verification, and two backup keys. Two hundred codes is by far the largest capacity on this shelf, where the next highest is 100 and most are 50 | Up to 200 days in Wi-Fi mode or 300 days in Bluetooth mode, on 4 AA cells INCLUDED. It is the ONLY battery figure on this shelf quoted separately for two radio modes, and the difference — a third of the life — is the real cost of remote access. Nothing else here tells you that |
Details checked on October 8, 2026.
The best-certified door on a budget, where a half-second fingerprint is the daily route in
Amazon reports what buyers took in the month before this page was last checked: at least 3,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
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.
