Image Slideshow Items

  • Eufy Smart Lock E31
  • Smart Lock E31
  • Smart Lock E31
  • Smart Lock E31
  • Smart Lock E31
  • Smart Lock E31
  • Smart Lock E31
Last updated July 2026

Eufy Smart Lock E31

4.2
261 ratings
Launch Year: 2024

Model: T85F0T11

Open selection
Our review

eufy Smart Lock E31 Review: A Matter and Apple Home Fingerprint Deadbolt With a Rechargeable Battery (and Battery Caveats)

A well-built keyless deadbolt with a fast fingerprint reader, built-in Wi-Fi and broad smart-home support, powered by a rechargeable 10000mAh pack, but some owners report short battery life and no low-battery warning.

The verdict

The eufy Smart Lock E31 is the rechargeable-battery version of eufy's Matter-ready fingerprint deadbolt (the near-identical E30 uses replaceable AA batteries). Owners love how quickly it installs, often 5 to 15 minutes swapping an old deadbolt, and how fast and accurate the fingerprint reader and keypad are. Its big advantage over most eufy locks is broad smart-home support: built-in Wi-Fi plus Matter, Apple Home, Alexa and Google, so you can control it by voice, check status and view an access history. The headline feature is the 10000mAh rechargeable battery pack with USB emergency power, which many welcome as an end to constantly tossing AA batteries, and it often holds charge very well (one owner lost just 1% in two weeks). But battery is also its biggest risk: a subset of owners report the pack lasting only a week and a half to a month with light use and, worse, no low-battery warning before it dies, an issue discussed on forums and possibly firmware-related, and customer support drew sharp criticism from those affected. Other caveats are shared with the line: no open-door sensor, a motor that's a bit loud for some, a non-rekeyable keyway, and hub requirements for full Apple Home or Google/Thread control. For a Matter and Apple Home fingerprint deadbolt you'd rather recharge than refill with AAs, it's appealing, but weigh the battery reports.

Best for
  • Matter and Apple Home households
  • Fingerprint keyless entry
  • Those who prefer a rechargeable battery over AAs
  • Alexa or Google Home users

Pros

  • Broad smart-home support: Matter, Apple Home, Alexa and Google
  • Fast, accurate fingerprint reader and responsive keypad
  • Very easy 5 to 15 minute install on an existing deadbolt
  • Rechargeable 10000mAh battery with USB emergency power (no AA waste)
  • Built-in Wi-Fi with remote control and access history
  • Solid, non-bulky build with a physical-key backup

Cons

  • Some owners report short battery life and no low-battery warning
  • Customer support criticized by affected owners
  • No open-door sensor, so it can lock while the door is open
  • Keyway can't be rekeyed; full Apple Home/Google needs a hub or Thread router
  • Not supported by Home Assistant

Who is the eufy E31 for?

This is a keyless fingerprint deadbolt with built-in Wi-Fi and unusually broad smart-home support, Matter, Apple Home, Alexa and Google, distinguishing it from most eufy locks. It unlocks via fingerprint, a keypad passcode, the app remotely, and a physical key, with auto-lock and an access history. It runs on a built-in 10000mAh rechargeable battery pack with USB emergency power, which is the key difference from the otherwise-similar E30 (which uses 8 replaceable AA batteries). It best suits Matter and Apple Home households, fingerprint keyless-entry fans, people who prefer recharging over swapping AAs, and Alexa or Google users. Given some reported battery issues, buy from a seller with easy returns, and if you'd rather use standard AAs, consider the E30 instead.

What buyers love

Installation is a recurring highlight: owners swap it onto an old deadbolt in 5 to 15 minutes, often calling it mechanical plug-and-play, and app setup and fingerprint enrollment are quick. The fingerprint reader is fast and accurate (several say faster than unlocking a phone), and the touch keypad is responsive. The standout versus other eufy locks is smart-home breadth: built-in Wi-Fi plus Matter, Apple Home, Alexa and Google, so owners use Siri or Alexa to lock, unlock and check status, and value the access history, this is a favorite among Apple Home users who wanted reliable Siri control. The rechargeable 10000mAh battery is a big draw for many, ending the cycle of tossing AA batteries (a relief for those replacing Kwikset Kevo or Halo locks that ate cells every few weeks), it ships pre-charged, has a USB emergency port, and for some holds charge excellently (one owner lost only 1% over two weeks). Build quality feels solid and not bulky, the motor is quiet for many (a welcome change from a noisy Schlage), auto-lock adds peace of mind, it pairs with eufy doorbells, and a physical key provides backup, all at a competitive price.

What to know before you buy

The biggest risk is the battery. While many owners get great life, a notable subset report the rechargeable pack lasting only about a week and a half to a month even with light use, and, more seriously, giving no low-battery warning before it dies, which risks a lockout (an issue owners found discussed on forums and suspect is firmware-related). Affected owners also describe frustrating, seemingly automated customer support that offered to sell another battery rather than resolve the fault. Because of this, keep a physical key accessible and monitor charge closely. Other caveats are shared across the line: the lock has no open-door sensor, so it can try to auto-lock even when the door is open, the motor is a bit loud and less smooth for some (though quiet for others), and the keyway can't be rekeyed to match your other doors. For full smart-home control, Apple Home and Siri work reliably only if you have an Apple home hub (like a HomePod) once your phone screen is off, and Google Home via Thread needs a Thread border router. It also isn't supported by Home Assistant, and there's no brushed-nickel finish.

Is the eufy E31 worth it?

For a good-looking fingerprint deadbolt with broad smart-home support and no AA batteries to buy, the eufy Smart Lock E31 is appealing: easy to install, a fast fingerprint reader and keypad, built-in Wi-Fi, Matter/Apple Home/Alexa/Google compatibility, a physical-key backup, and a rechargeable 10000mAh pack with USB emergency power, at a competitive price. The catch is battery reliability: while many owners are delighted, a meaningful subset report short life and no low-battery warning, with unhelpful support, so this is the thing to weigh. If you want the rechargeable-battery convenience and buy where returns are easy, it can be excellent; if you'd rather avoid the battery-firmware risk, the AA-powered E30 covers the same features, and if you need an open-door sensor or Home Assistant, look elsewhere.

Frequently asked questions

What's the difference between the E31 and E30?

They are near-identical fingerprint deadbolts; the difference is the battery. The E31 uses a built-in 10000mAh rechargeable pack with USB emergency power, while the E30 uses 8 replaceable AA batteries. Choose the E31 to avoid buying AAs, or the E30 if you'd rather swap standard cells, especially given some E31 battery-life reports.

Are there battery problems I should know about?

For many owners the rechargeable battery holds charge very well, but a notable subset report it lasting only about a week and a half to a month with light use and, critically, giving no low-battery warning before dying, which can cause a lockout (owners suspect a firmware issue). Keep a physical key handy, monitor the charge, and buy where returns are easy.

Does it work with Apple Home, Matter, Alexa and Google?

Yes, this is its standout feature. It has built-in Wi-Fi and supports Matter, Apple Home, Alexa and Google for voice and app control plus status and history. Reliable Apple Home/Siri control when your phone is asleep needs an Apple home hub (like a HomePod), and Google Home via Thread needs a Thread border router. It is not supported by Home Assistant.

Will it auto-lock even if my door is open?

Potentially, yes. Like the rest of this line, the E31 has no open-door sensor, so it can't tell whether the door is closed and may auto-lock regardless. Keep that in mind when using auto-lock with the door propped open.

How is the fingerprint reader and installation?

Both are strong. The fingerprint reader is fast and accurate (some say quicker than unlocking a phone), and the keypad is responsive. Installation is easy, owners typically swap it onto an existing deadbolt in 5 to 15 minutes, and app setup and fingerprint enrollment are straightforward. The battery ships pre-charged.

At a glance

Summary

Everything this door lock supports, grouped by category.

Power
Backup Battery (USB-C emergency charging)
Connectivity
2.4 GHz WiFi
Integrations
Google HomeAlexaApple HomeKitSamsung SmartThingsHome AssistantMatter
Lock/Unlock System
RemotePasscodeFingerprintPhysical Key
Automatic Lock / Unlock
Afer Door is closed
Alerts
Door Locks/UnlocksLow Battery Alert
Features
One-Time PasswordPeriodic PasswordAnti-peep Password

Price History

Loading price history...

Company
Eufy logo

Eufy

4.3/ 5 avg ratingChina flagHeadquartered in China

Eufy, a brand of Anker, makes a wide range of smart home and security devices including robot vacuums, security cameras, video doorbells and smart locks. Eufy emphasizes local storage and subscription-free options for its cameras, appealing to privacy-conscious buyers. Its products integrate with Alexa and Google Home.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Weather Resistance

?

Outer Panel Dimensions

?

Inner Panel Dimensions

?

Weight

?

Available in colors

NO

Power
Battery Type

Built-in

Battery Life

14 months

Backup Battery

USB-C emergency charging

Connectivity
2.4 GHz WiFi

YES

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Other

NO

Integrations
Google Home

YES

Alexa

YES

Apple HomeKit

YES

Via Matter

Samsung SmartThings

YES

Via Matter

Home Assistant

YES

IFTTT

?

Matter

YES

Lock/Unlock System
Remote

YES

Built-in Wi-Fi, no bridge required

Bluetooth

NO

Passcode

YES

Keypad

Fingerprint

YES

Unlock in less than 0.3 seconds, self-improving recognition

Face Recognition

NO

NFC Tag

NO

Apple Home Key

NO

Physical Key

YES

Automatic Lock / Unlock
When Away

NO

Afer Door is closed

YES

By Geolocation

?

Alerts
Door Locks/Unlocks

YES

Tamper-proof Alert

?

Low Battery Alert

YES

Low battery alert at 20% charge

Multiple Unlocking Failure Alert

?

Video
HD Video

NO

2K Video

NO

Night Vision

NO

Internal Storage

NO

MicroSD Card Slot

NO

Motion Detection

NO

Range Of Detection

-

Customizable Area

NO

Sensors
Door Open/Close

?

Features
One-Time Password

YES

Periodic Password

YES

Anti-peep Password

YES

Emergency Fingerprint

NO

Doorbell

NO

On sale now

13 other Door Locks on sale

View all
Head to head

Eufy Smart Lock E31 vs the competition

View all
Eufy

More from Eufy

View all
Stay in the loop

Smart Home Deals & News straight to your inbox

Join the newsletter and get the best smart home deals and new releases in your inbox.

Your subscription could not be saved. Please try again.
Your subscription has been successful.

Smart Home Deals & News straight to your inbox

Join the newsletter and get the best smart home deals and new releases in your inbox.