The interesting question is what happens when the battery dies · review
The only battery figure on this shelf with its assumption printed next to it — eight months at about ten unlocks a day.
The conclusion The only lock on this shelf that prints the assumption behind its battery claim — eight months at about ten unlocks a day — which is worth more than a longer number without one, and the only one built around Apple Home with no bridge. The split warranty, eighteen months on the electronics and thirty-six on the mechanics, is similarly honest. No BHMA grade, no IP rating and no fingerprint, all of which the maker's own C220 has for twenty dollars more.
No fingerprint. No emergency power terminal. No BHMA grade. No IP rating.
Which is the only published assumption on this shelf.
Three other locks here claim eight months and say nothing about what that depends on.
Ten unlocks a day is a couple going out and coming back, plus a delivery.
A family of five, each in and out twice, is nearer twenty — and eight months becomes four.
A holiday cottage opened twice a month will far exceed it.
Same hardware, same arithmetic, and this is the one that shows it.
Eighteen months electronic. Thirty-six mechanical.
The electronics are the part that goes first, and they are covered for half as long as the metal.
It is the only split warranty on this shelf, and the split is the honest shape.
Which is worth saying.
The C220 on this shelf costs twenty dollars more and publishes BHMA Grade 3, a 100,000-cycle count, IP53, and an operating range down to minus thirty.
None of that appears here. Nor a fingerprint reader, nor Apple Watch unlocking.
What this adds is Apple Home as a first-class platform, with no bridge, and the honest battery assumption.
Certification matters: take the C220. The Home app matters: take this.
One layer, where six locks here have two.
This shelf’s introduction: a key override, an emergency terminal that takes a power bank, or nothing at all.
This is the first of the three. Keep the key outside the house.
On sale at around $80 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.
| Battery | 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 |
|---|---|
| Platform | Native Apple Home integration with unlocking and guest access managed from the Home app on an iPhone, with no additional hub required — plus Google Home, Alexa and SmartThings. It is the only lock on this shelf with Apple Home named as its primary ecosystem, and remote control runs through a HomePod or another hub |
| Credentials | 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 |
| Failure path | 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 |
| Warranty | 18 months of electronic protection and 36 months of mechanical coverage, stated, with 24/7 support. It is the only split warranty on this shelf, and the split is honest: the electronics are the part that fails first and they are covered for half as long |
| Fitting | Compatible with standard doors in the US and Canada, with a 15-minute installation and no drilling — stated. No bore size and no door thickness figure appears, where the maker's C220 names the 54 mm (2.13 in) bore and its spacer |
| Features | Simple setup, access management, real-time notifications, event logs and remote unlocking, stated |
| Grade | 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 |
| Biometrics | None. No fingerprint, no palm and no face reader, and therefore no biometric data stored anywhere |
| Amazon reference | B0GRGNB36B |
| EAN | 0194644322595 |
Because it is the only published assumption behind a battery claim on this shelf, and it turns a marketing figure into something you can apply to your own household. Ten unlocks a day is a couple going out and coming back, with a delivery. A family of five, each in and out twice, is closer to twenty — and eight months becomes four. A holiday cottage opened twice a month will far exceed eight months. Three other locks here claim eight months with no condition attached; this is the same hardware with the arithmetic shown.
For an iPhone household, yes, because of where the lock then lives. A lock in the Home app is managed alongside everything else, shares access with family members through their Apple IDs, and appears in automations without the maker's own app being opened — and eufy states no additional hub is needed. Remote control does need a HomePod or another Apple home hub, which most Apple households already have. No other lock on this shelf names Apple Home as its primary ecosystem; one names Matter, which is the broader answer.
A fair question, since the C220 on this shelf costs twenty dollars more and publishes BHMA Grade 3, a 100,000-cycle count, IP53 and an operating temperature range down to minus thirty — none of which appears here. The C34 also drops the fingerprint reader and the Apple Watch unlocking. What it adds is Apple Home as a first-class platform and the honest battery assumption. If certification matters, the C220 is the one with the paperwork; if the Home app matters, this is the one that lives in it.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Battery | Credentials | Failure path | Fitting |
|---|---|---|---|---|---|
| eufy Security T85D2 Smart Lock C34, Apple Home, keyless entry | $80 | 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 | 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 | 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 | Compatible with standard doors in the US and Canada, with a 15-minute installation and no drilling — stated. No bore size and no door thickness figure appears, where the maker's C220 names the 54 mm (2.13 in) bore and its spacer |
| Sifely Fingerprint smart door lock with handle and keypad | $80 | 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 | 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 | 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 | Designed to fit most standard doors with no extra drilling, stated, with a few minutes to install. No door thickness range and no bore size appears |
| WYZE WLCKB2 Auto-Lock Bolt v2, AI fingerprint, BHMA Grade 2 | $79 | 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 | 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 | 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 | Not published. No door thickness range and no bore size appears |
| eufy Security T8506 Smart Lock C220, fingerprint, 6 ways to unlock | $100 | 8 AA cells for around 8 months, stated to vary with how often the lock is used. The variability is acknowledged without a figure, where one lock on this shelf states its assumption as about ten unlocks a day | Six ways: fingerprint reading in under one second, the eufy Security app, the keypad, a physical key, an Apple Watch, and Alexa or Google voice. The Apple Watch is unique on this shelf and is the most practical of the six in the rain | A physical key, one of the six ways to unlock. NO emergency power terminal is published, so there is one layer rather than two — and this shelf's introduction says this is the question that should decide the purchase. Six locks on this shelf publish both a key and a USB-C port | Compatible with most standard deadbolts and fits bores under 54 mm (2.13 in) by removing a spacer — stated, with a 15-minute installation and no drilling. The spacer detail is the practical part: a smaller bore does not mean a different lock |
Details checked on October 8, 2026.
An Apple household that wants the lock in the Home app without a bridge
Amazon reports what buyers took in the month before this page was last checked: at least 100.
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.
