Door Locks · Head to head

Eufy Smart Lock C220 vs Eufy Smart Lock E31

Full Smart Door Locks comparison in 2026

Updated November 2026
Data from the official Eufy site.
2026 verdict
For a front door you want to unlock by fingerprint, app or Siri, the Eufy Smart Lock E31 is the more capable of these two eufy deadbolts.
Eufy Smart Lock E31
Winner
Eufy Smart Lock E31
$149.99
Buy on Amazon USA
It adds Matter over Thread on top of built-in Wi-Fi, so it works with Apple Home, Alexa, Google Home, SmartThings and Home Assistant, where the Eufy Smart Lock C220 stays on Alexa, Google Home and Home Assistant with no HomeKit or Matter. The E31 also runs a rechargeable pack rated longer than the C220's 8 AA cells, carries a longer warranty and can issue single-use passcodes, while the C220 is the cheaper, better reviewed lock and the one whose batteries you can swap anywhere in seconds. Pick the Eufy Smart Lock C220 for the lowest price and a straightforward Alexa or Google setup, and the Eufy Smart Lock E31 for an Apple Home or Matter home that would rather recharge than refill.
Works with
Connectivity
  • Wi-Fi 2.4 GHz
vs
Works with
Connectivity
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The biggest differences

Where these two are furthest apart, and by how much.

  • Battery Life+75%Eufy Smart Lock E3114 months vs 8 months
  • Warranty+50%Eufy Smart Lock E311.5 years vs 1 year
FeatureEufy Smart Lock C220Eufy Smart Lock E31Winner
Price$109.99$149.99Eufy Smart Lock C220
Rating4.23.9Eufy Smart Lock C220
Warranty1 year1.5 yearsEufy Smart Lock E31
Battery Life8 months14 monthsEufy Smart Lock E31
Connectivity2.4 GHz WiFi2.4 GHz WiFi, Bluetooth, Thread ProtocolEufy Smart Lock E31
IntegrationsGoogle Home, Alexa, Home AssistantGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterEufy Smart Lock E31
One-Time PasswordNOYESEufy Smart Lock E31
Weather ResistanceIP53IP53Tie
Lock/Unlock SystemRemote, Passcode, Fingerprint, Physical KeyRemote, Passcode, Fingerprint, Physical KeyTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie

What the differences mean

Smart-home support

The Eufy Smart Lock E31 is Matter certified over Thread, so it works with Apple Home, SmartThings, Alexa, Google Home and Home Assistant. The Eufy Smart Lock C220 reaches only Alexa, Google Home and Home Assistant, with no HomeKit or Matter at all.

Battery

The Eufy Smart Lock E31 uses a built-in rechargeable pack rated around 14 months with USB-C emergency charging, while the Eufy Smart Lock C220 runs on 8 AA cells rated around 8 months. Recharge the E31, or swap the C220's batteries anywhere without waiting.

Warranty

The Eufy Smart Lock E31 carries 18 months of electronic and 36 months of mechanical cover, against a single year on the Eufy Smart Lock C220, the longer protection going to the newer lock.

Guest codes

The Eufy Smart Lock E31 can issue a one-time passcode that works once and expires, which suits a delivery or a one-off visitor. The Eufy Smart Lock C220 offers scheduled and periodic codes but no single-use option.

Price

The Eufy Smart Lock C220 is the cheaper of the two, which is what wins it the price row. The Eufy Smart Lock E31 asks more for Matter, Apple Home, the rechargeable battery and the one-time codes.

Which one to buy if

Winner
Eufy

Eufy Smart Lock E31

Prime exclusive deal
$149.99
Buy on Amazon USA
  • + Warranty: 1.5 years
  • + Battery Life: 14 months
  • + Connectivity: 2.4 GHz WiFi, Bluetooth, Thread Protocol
  • - Price: $149.99 vs $109.99
  • - Rating: 3.9 vs 4.2

What owners say

Owners of both eufy locks tell the same install story: it is a short, screwdriver-only swap that most finish in under half an hour, and both groups praise a fast fingerprint reader and a responsive keypad. Eufy Smart Lock C220 owners single out built-in Wi-Fi that gives full remote control with no hub, a dependable auto-lock that warns them when the door did not close, and a long run on its 8 AA cells, with only a few finding the fingerprint inconsistent and the keypad dim at night. Eufy Smart Lock E31 owners talk more about broad smart-home control through Matter and Apple Home and a rechargeable pack many say holds charge well, but a notable subset report the pack lasting only weeks with no low-battery warning, and they are the loudest about support.

Frequently Asked Questions

Which is better overall: Eufy Smart Lock C220 or Eufy Smart Lock E31?

The Eufy Smart Lock E31, for its Matter and Apple Home support, its rechargeable battery rated longer than the C220's AA cells, and its longer warranty. The Eufy Smart Lock C220 is the cheaper, better reviewed lock and the better fit for a straightforward Alexa or Google Home setup.

What is the biggest difference between the Eufy Smart Lock C220 and the Eufy Smart Lock E31?

Smart-home reach. The Eufy Smart Lock E31 is Matter certified over Thread and works with Apple Home, SmartThings, Alexa, Google Home and Home Assistant, while the Eufy Smart Lock C220 is limited to Alexa, Google Home and Home Assistant with no HomeKit or Matter.

Do the Eufy Smart Lock C220 and Eufy Smart Lock E31 use the same battery?

No. The Eufy Smart Lock E31 has a built-in rechargeable 10000mAh pack rated around 14 months with USB-C emergency charging. The Eufy Smart Lock C220 uses 8 AA batteries rated around 8 months, with a USB port for emergency power.

Which lock has the longer warranty?

The Eufy Smart Lock E31, with 18 months of electronic and 36 months of mechanical coverage. The Eufy Smart Lock C220 carries a one-year warranty.

Do both locks open by fingerprint and keep a physical key?

Yes. Both the Eufy Smart Lock C220 and the Eufy Smart Lock E31 unlock by fingerprint, keypad passcode, the app and a physical key, and each keeps an access history with lock and unlock alerts.

Who should buy the Eufy Smart Lock C220?

Buy it for keyless entry on a budget in an Alexa, Google Home or Home Assistant home, where built-in Wi-Fi gives remote control without a hub and standard AA batteries are easy to keep on hand.

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