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Door Locks · Head to head

Eufy Smart Lock E30 vs Eufy Smart Lock E31

Full Smart Door Locks comparison in 2026

Updated September 2026
Data from Amazon and official Eufy site.
2026 verdict
Between these two near-identical smart locks, the Eufy Smart Lock E30 is the safer pick: same fingerprint deadbolt, same Matter support, and swappable AA batteries instead of a built-in pack.
Eufy Smart Lock E30
Winner
Eufy Smart Lock E30
$119.99
Buy on Amazon USACheck price
The Eufy Smart Lock E31 is the one to choose if you would rather recharge than ever buy a battery, and its rated life is longer, 14 months against 8 months for the E30's eight AA cells. Everything else that a buyer touches is shared: built-in 2.4 GHz Wi-Fi, fingerprint, passcode and app unlocking with a physical key as backup, auto-lock after the door closes, and Alexa, Google Home, Apple Home, SmartThings and Matter support. The E31 also lists an anti-peep passcode feature and USB-C emergency charging that the E30 sheet does not. Pick the Eufy Smart Lock E30 if a dead battery must never lock you out, and the Eufy Smart Lock E31 if you are set on a rechargeable lock.
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FeatureEufy Smart Lock E30Eufy Smart Lock E31Winner
Price$119.99$124.99Eufy Smart Lock E30
Rating4.23.9Eufy Smart Lock E30
Battery Life8 months14 monthsEufy Smart Lock E31
Warranty1.5 years1.5 yearsTie
Weather ResistanceIP53IP53Tie
Connectivity2.4 GHz WiFi, Bluetooth, Thread Protocol2.4 GHz WiFi, Bluetooth, Thread ProtocolTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Lock/Unlock SystemRemote, Passcode, Fingerprint, Physical KeyRemote, Passcode, Fingerprint, Physical KeyTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie

What the differences mean

Battery type

The Eufy Smart Lock E30 runs on eight AA cells that you swap when they run down, so a dead battery is a two-minute fix from any store. The Eufy Smart Lock E31 has a built-in rechargeable pack, which spares you the cells but means the lock itself has to be charged.

Rated battery life

14 months for the Eufy Smart Lock E31 against 8 months for the Eufy Smart Lock E30. The gap is real on paper, but the E31's owners describe a wide spread in practice, so treat the longer figure as a best case.

Emergency power

The Eufy Smart Lock E31 lists USB-C emergency charging as its backup, useful if the pack does run flat. The Eufy Smart Lock E30 lists no backup battery, but it does not need one: fresh AA cells are the backup.

Anti-peep passcode

The E31 sheet lists an anti-peep passcode, which lets you hide the real code among extra digits when someone may be watching. It is not documented for the Eufy Smart Lock E30, so a buyer who enters a code in a shared hallway should check that first.

Which one to buy if

What owners say

Owners of both eufy locks agree on the good parts: an install that takes 5 to 15 minutes on an existing deadbolt, a fingerprint reader that beats unlocking a phone for speed, and Matter and Apple Home control that makes Siri lock and unlock reliable. Both groups also mention the same limits: no open-door sensor, so auto-lock can try to close on an open door, a motor some find loud, a keyway that cannot be rekeyed and a hub or Thread border router for full Apple Home or Google control. Eufy Smart Lock E30 owners single out the freedom of swapping AA cells, with a tip to use lithium ones. Eufy Smart Lock E31 owners like never handling loose batteries, but a subset report the pack lasting only weeks and dying with no low-battery warning, and criticize the support they got.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Eufy Smart Lock E30
  • Eufy Smart Lock E31

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Frequently Asked Questions

Which is better overall: Eufy Smart Lock E30 or Eufy Smart Lock E31?

The Eufy Smart Lock E30, narrowly. It offers the same fingerprint, passcode and Matter features as the Eufy Smart Lock E31 with replaceable AA batteries, which avoids the battery complaints some E31 owners report. The E31 wins on rated battery life.

What is the difference between the Eufy Smart Lock E30 and the Eufy Smart Lock E31?

The power source. The Eufy Smart Lock E30 uses eight AA batteries rated for about 8 months, while the Eufy Smart Lock E31 has a built-in rechargeable pack rated for 14 months with USB-C emergency charging. Their unlocking methods and smart home support match.

Do the Eufy Smart Lock E30 and the Eufy Smart Lock E31 both support Matter and Apple Home?

Yes. The Eufy Smart Lock E30 and the Eufy Smart Lock E31 both list Matter, Apple Home, Alexa, Google Home and SmartThings support over built-in 2.4 GHz Wi-Fi. Owners note that reliable Siri control with the phone screen off needs an Apple home hub.

Can you unlock the Eufy Smart Lock E30 and the Eufy Smart Lock E31 with a fingerprint?

Yes, both have a fingerprint reader, a keypad passcode, remote unlocking from the app and a physical key as backup. Both can also auto-lock after the door is closed, but neither is documented with an open-door sensor.

Who should buy the Eufy Smart Lock E30?

Buyers who want a fingerprint deadbolt with Matter and Apple Home support and prefer to swap standard AA batteries, ideally lithium ones, rather than depend on a built-in pack.

Who should buy the Eufy Smart Lock E31?

Buyers who would rather recharge than buy batteries, want the longer rated life and the anti-peep passcode, and are comfortable keeping the physical key close in case the pack runs low.

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