eufy Security Smart Lock E31 | Manufacturer Renewed (Good Condition)
Sale price
$299.00
Regular price $449.95
Skip to product information
eufy Security Smart Lock E31 | Manufacturer Renewed (Good Condition)
Sale price
$299.00
Regular price $449.95
CamGuard Australia
Independent eufy specialists · Townsville QLD
♻️ Manufacturer Renewed · Good Condition
eufy Smart Lock E31
The fingerprint deadbolt that retires your key ring for good. Touch, click, gone — the daily run-out-the-door in under a third of a second. Renewed by the manufacturer, warranted by us.
🖐 Fingerprint · 🔢 Keypad · 📱 App · 🔑 Key · 🗣 Voice — five ways through your own front door
First stop: what "Renewed" actually means
This lock had a previous life. It went back through eufy/Anker's official manufacturer renewal program, where it was inspected, tested and restored to full working order before being graded for resale. The renewal and testing are the manufacturer's — we don't pull every unit apart on a bench and won't pretend to.
This unit is graded Good — a mid renewed grade. Expect visible cosmetic wear you'd spot on close inspection: scuffs and handling marks around the body, with full working order underneath. It ships in renewed (non-retail) packaging, not a sealed shop box.
What we add on our end: every unit's , and it's covered by our in-house 12-month CamGuard warranty — a CamGuard warranty, not a manufacturer warranty — on top of your rights under Australian Consumer Law.
<0.3sfingerprint unlock
14 moper charge (~10 unlocks/day)
5 waysthrough the door
50 / 100fingerprints / passcodes
Auto-lockre-bolts behind you
Mattersmart-home ready (via a hub)
Your finger is the only ticket you'll ever need
Register a fingerprint once and the morning routine changes for good: hand on the pad, deadbolt retracts in under 0.3 seconds, you're gone. No fishing for keys with an armful of shopping, no spare-under-the-mat gamble, no "did I lock it?" from the driveway. The lock holds up to 50 fingerprints and 100 passcodes, so every housemate, kid and dog-walker gets their own way in.
Set it to auto-lock and it re-bolts itself behind you a moment after the door closes — one less thing on the daily checklist.
Left your phone inside? Left your everything inside?
Belt and braces, five deep. Tap a passcode on the numeric keypad (blue light = unlocked, orange = locked, so you always know where you stand). Grant a one-off code to the plumber from the couch and pull it later. Lock, unlock and check the door remotely from the eufy Security app — the lock has its own built-in 2.4GHz Wi-Fi, so app and remote access work straight out of the box with no separate bridge. And there's always the physical key as the old-fashioned backstop (two are in the box).
Runs for a year, warns you long before it doesn't
A single built-in 10,000mAh rechargeable pack runs the lock for up to 14 months at around ten unlocks a day, then tops up over USB-C — no drawer full of AA batteries to keep buying. At 20% it starts nudging you in the app, and a power-save mode buys roughly another month if you ignore it (we've all been there).
And if it ever runs flat at the worst possible moment, there's a USB-C port on the underside of the outdoor unit: touch a phone power bank to it for enough juice to fingerprint or key your way in. You are not sleeping in the car.
The departures board
Five services, all running to the same platform: your front door. Pick whichever suits the moment.
Service
How it runs
Status
🖐 FINGERPRINT
One touch, unlocks in under 0.3s. Up to 50 prints stored.
On time
🔢 KEYPAD CODE
Up to 100 passcodes, including one-off guest codes.
On time
📱 EUFY APP
Lock, unlock & check the door remotely over the lock's own Wi-Fi.
On time
🔑 PHYSICAL KEY
Two keys included. The dependable backstop that never needs charging.
On time
🗣 VOICE
Siri, Alexa or Google via Matter — check or control it hands-free.
Needs a hub
"The last key you'll ever lose is the one you stopped carrying. Your finger doesn't fall down the back of the couch."— The vibe, in one sentence
The honest bit
Every lock has fine print. Here's this one's, up front.
It was used before.
This is a Manufacturer Renewed unit, graded Good — it carries visible cosmetic wear you'll notice on close inspection, though it's been tested to full working order and the testing behind that is eufy/Anker's, not ours. If you need a factory-sealed lock, this isn't the listing for you.
It's a deadbolt replacement, so door fit matters.
The E31 replaces a standard deadbolt — not a mortice lock or a lever handle set. It fits an adjustable 60mm or 70mm backset, a 38mm or 54mm cross bore, and a door 35–55mm thick. Most Aussie timber and metal doors within that thickness are fine, and a drill template is included for non-standard prep, but measure your door first. If you don't currently have a deadbolt, or you've got a mortice/lever lock, this won't drop straight in.
The Wi-Fi channel trap is real.
The radio is 2.4GHz only and connects on channels 1–11. If your router is sitting on channel 12 or 13, the lock won't connect until you switch it to a channel in the 1–11 range — a 30-second change in your router settings, and our first question if you ever get stuck on setup.
Smart-home (and voice) needs a Matter hub with Thread.
The built-in Wi-Fi runs the eufy Security app on its own. But to add the lock to Apple Home, Google Home, Alexa or SmartThings — or to control it by voice — you'll need a Matter controller that includes a Thread border router (a HomePod mini, Apple TV 4K, Echo 4th-gen, Nest Hub 2nd-gen or SmartThings hub). Plain Wi-Fi alone won't join those ecosystems.
No Apple HomeKey, and the key can't be rekeyed.
You can control the lock through Apple Home via Matter, but tap-to-unlock HomeKey (the Apple Wallet card trick) is not supported on the E31. The physical keys can be copied at a locksmith, but the cylinder cannot be rekeyed to match an existing key.
Rechargeable pack, and a weather-resistant (not submersible) exterior.
Power is a built-in 10,000mAh pack you recharge over USB-C, not swappable AA cells. The outdoor unit is weather-resistant and rated for exterior temps down to −30°C and up to 70°C, but eufy doesn't publish a confirmed IP figure for it, so we won't print one — treat it as suited to a normal covered or semi-exposed entry, not a spot that gets hosed down.
Why buy it from CamGuard?
12-month CamGuard warranty
Our own in-house warranty on every unit we sell, renewed included. Not a manufacturer warranty — it's us, in Townsville, and it's the cover that actually applies on every unit we sell.
Graded honestly before listing
We grade every unit honestly before it's listed, so what you read is what turns up.
eufy is all we do
We're independent eufy specialists. Door-prep questions, the Wi-Fi channel thing, "will it fit my door" — ask before you buy, we'd rather you were sure.
Dispatched in 1 business day
From Townsville QLD, with tracking on every order.
Full specifications
| Unlock methods | Five — fingerprint (under 0.3s), keypad passcode, eufy Security app (remote), physical key, and voice via Siri / Alexa / Google (voice runs through Matter, not standalone) |
|---|---|
| Fingerprint / passcode capacity | Up to 50 fingerprints, up to 100 passcodes |
| Keypad | Numeric keypad with lock/unlock button and status light (blue = unlocked, orange = locked, red = abnormal) |
| Auto-lock | Yes — re-bolts automatically after the door closes |
| Battery | Built-in 10,000mAh rechargeable, up to 14 months (~10 unlocks/day); low-battery alert at 20%; power-save mode adds ~1 month. Recharged via USB-C, not swappable AA cells |
| Emergency power | USB-C port on the underside of the exterior unit — power from a portable charger to unlock if the battery is flat |
| Wi-Fi | Built-in 2.4GHz Wi-Fi (2412–2472MHz / channels 1–11); no 5GHz. Serves the eufy app and remote access with no separate gateway |
| Smart home | Matter over Thread — Apple Home, Google Home, Alexa & SmartThings via a Matter controller with a Thread border router (Bluetooth used for setup) |
| Apple HomeKey | Not supported (HomeKit control via Matter only — no tap-to-unlock) |
| App | eufy Security app (iOS / Android) |
| Door — backset | 2⅜ in (60mm) or 2¾ in (70mm), adjustable — faceplate rotates 180° |
| Door — cross bore | 1½ in (38mm) or 2⅛ in (54mm) — remove the spacer for 38mm |
| Door — thickness | 1⅜–2⅛ in (35–55mm); edge bore 1 in (25mm); latch hole depth ≥25.4mm |
| Door compatibility | Deadbolt replacement (not a mortice or lever-set lock); standard pre-bored deadbolt doors fit, drill template included for others |
| Keyway | Physical key backup, 2 keys included — can be copied, cannot be rekeyed |
| Operating temperature | Interior −10°C to 50°C; exterior −30°C to 70°C |
| Weatherproofing | Weather-resistant exterior (eufy publishes no confirmed IP figure) |
| Finish | Black |
| Hub requirement | None for the app & fingerprint/keypad/key — the lock's own Wi-Fi handles those. A Matter/Thread hub is only needed for third-party smart-home ecosystems |
Will it work with your door & setup?
The honest yes/no before you buy — locks are less forgiving than cameras, so read this row by row.
YES
A door with a standard deadbolt, 35–55mm thick, with a 60/70mm backset and 38/54mm cross bore. That covers most common timber and metal entry doors.
YES
The eufy Security app on its own — fingerprint, keypad, key and app/remote all work over the lock's built-in 2.4GHz Wi-Fi with no hub or bridge to buy.
YES
Apple Home, Google Home, Alexa & SmartThings — via Matter (see the note below on what that needs).
NOTE
Matter needs a Thread hub. To join those ecosystems (or use voice) you'll need a Matter controller with a Thread border router — e.g. HomePod mini, Apple TV 4K, Echo 4th-gen, Nest Hub 2nd-gen or a SmartThings hub.
NOTE
Set your router to Wi-Fi channel 1–11. The lock connects on a 2.4GHz radio using channels 1–11; channel 12/13 won't connect until you switch.
NO
Mortice locks & lever handle sets — the E31 replaces a deadbolt only; it won't fit a mortice or lever-set door.
NO
Apple HomeKey (tap-to-unlock via Apple Wallet) — not supported on this model.
NO
5GHz-only Wi-Fi — it needs a 2.4GHz network (nearly all home routers provide one).
Probably not for you if…
- Your door has a mortice lock or lever handle set, not a deadbolt
- Your door is thinner than 35mm or thicker than 55mm
- You specifically want Apple HomeKey tap-to-unlock
- You want a factory-sealed unit (see our New listings instead)
- You can't change your router off Wi-Fi channel 12/13
Perfect for…
- Anyone sick of juggling keys with their hands full
- Share houses that need a code or print per person
- Handing tradies a one-off code instead of a spare key
- A standard deadbolt door you'd love to make keyless
- Value hunters who'd rather bank the saving than pay for shrink-wrap
On the platform in four stops
Roughly a screwdriver, twenty minutes and a phone. No electrician, no locksmith.
1Measure & swap
Remove your old deadbolt; fit the E31 using the adjustable backset and included template.
2Get the app
Download eufy Security (iOS/Android), create a free account and add the lock.
3Join Wi-Fi
Connect over your 2.4GHz network — router on channel 1–11.
4Enrol prints & codes
Add fingerprints and passcodes, switch on auto-lock, hand back the keys.
What's in the box
Ships in renewed (non-retail) packaging, containing:
- 🔒 Exterior assembly (fingerprint sensor + numeric keypad + keyway)
- 🔧 Interior assembly with thumbturn & mounting plate
- 🔩 Adjustable deadbolt (60/70mm backset)
- 🔋 10,000mAh rechargeable battery pack
- 🚪 Strike plate + strike-plate screws
- 🧰 Screw/installation kit + rubber plug
- 🔑 2× physical keys
- 📄 Quick start guide + Matter QR setup card
Shipping, warranty & returns
🚀 Express as Standard
Australia Post Express included on every order over $99.00. Dispatched in 1 business day from Townsville QLD, tracking on every parcel.
🛡️ 12-month warranty
Our in-house CamGuard warranty — not a manufacturer warranty — in addition to your Australian Consumer Law rights. Faulty-item returns are always free.
↩️ 30-day returns
Changed your mind? Return within 30 days of delivery. Buyer covers return postage and original shipping isn't refunded. Have the serial number handy to start a return.
Passenger enquiries
The questions we'd ask before buying a smart lock ourselves.
What exactly does "Manufacturer Renewed" mean?
The lock was previously used, then returned and put through eufy/Anker's official manufacturer renewal process — inspected, tested and restored to full working order before being graded and resold. That testing is the manufacturer's, not a per-unit bench check by us. This unit is graded Good, ships in renewed (non-retail) packaging, and is covered by our 12-month CamGuard warranty (a CamGuard warranty, not a manufacturer one).
What does the "Good" grade look like cosmetically?
It's a mid renewed grade: you'll see visible cosmetic wear on close inspection — scuffs and handling marks around the body. It's honest, used-but-tidy wear that doesn't affect how the lock works, and priced below the top grade to match.
Will it fit my front door?
It replaces a standard deadbolt on a door 35–55mm thick, with an adjustable 60/70mm backset and a 38/54mm cross bore, and a drill template is included for non-standard prep. It will not fit a mortice lock or a lever handle set. If you're unsure, measure your door thickness and message us before buying — we'd rather check than have it come back.
It won't connect to my Wi-Fi. What's wrong?
Nine times out of ten it's the channel. Its 2.4GHz radio only uses channels 1–11. If your router is on channel 12 or 13, switch it to something in 1–11 in your router settings and try again. It also won't use a 5GHz network — make sure you're joining the 2.4GHz band.
Do I need a HomeBase or a hub?
No HomeBase needed. Fingerprint, keypad, key and the eufy app all work over the lock's own built-in Wi-Fi. The only time you need extra hardware is to link it to Apple Home, Google Home, Alexa or SmartThings — that uses Matter and needs a Thread border router hub.
Does it work with Apple Home / HomeKey?
It works with Apple Home through Matter (with a Thread hub, as above). Apple HomeKey — the tap-your-phone-or-watch-to-unlock feature — is not supported on the E31.
What happens if the battery dies while I'm out?
It warns you well ahead — a low-battery alert at 20%, and a power-save mode that stretches things about another month. If it ever does go flat, there's a USB-C port under the outdoor unit: hold a phone power bank to it for enough power to fingerprint or key your way in. And you've always got the two physical keys.
How does the price compare to buying new?
eufy sells the E31 new in Australia for $449.95 (price checked 23 July 2026). Renewed is how you get the same lock — manufacturer-tested and working — for meaningfully less.
How do I claim warranty if something goes wrong?
Contact us with your order details and the serial number. Faulty-item returns are always free.
Item specifics
| Brand | eufy (by Anker) |
|---|---|
| Model | Smart Lock E31 — T85F0J11 |
| Condition | Manufacturer Renewed — Good grade |
| Packaging | Renewed (non-retail) packaging |
| Type | Smart fingerprint deadbolt (deadbolt replacement) |
| Colour / finish | Black |
| Unlock methods | Fingerprint, keypad, app, physical key, voice (via Matter) |
| Connectivity | 2.4GHz Wi-Fi (built-in) · Matter over Thread · Bluetooth (setup) |
| Power source | Built-in 10,000mAh rechargeable battery (USB-C) |
| Door thickness | 35–55mm (1⅜–2⅛ in) |
Hand back the keys. Keep the finger.
Order today and it leaves Townsville within 1 business day — warranty active, key ring officially optional.