eufy Smart Lock E31 Fingerprint Deadbolt: features, specs and who it suits

The eufy Smart Lock E31 (model T85F0) is a keyless deadbolt that opens with a fingerprint, a keypad code, the app, a voice assistant or a physical key. It connects to the main smart home platforms, including Apple Home, and runs on a rechargeable battery. Here is how its features work and what to confirm for your own door.

Ways to unlock

The lock gives you several options so every household member can use the method that suits them. eufy lists fingerprint, app control, keypad, a physical key, and voice commands through Siri, Alexa or Google Assistant. The brand quotes an unlock time of under 0.3 seconds with a fingerprint, and says recognition improves with each use as the lock learns the print.

Having a physical key as a fallback is useful. Smart locks rely on batteries and electronics, and a mechanical backup means a flat battery or a connection problem doesn't have to leave anyone outside.

Smart home support

According to eufy, the lock works with Apple Home, Google Home, Alexa and SmartThings and supports Matter, the cross-platform smart home standard. In general, a lock like this needs a compatible hub or home device, such as a HomePod for Apple Home, to be controlled when you are away. eufy says remote use through Apple Home or other apps includes access management, real-time notifications, event logs and remote unlocking.

Check which hub or speaker you already own, because remote features depend on it. The brand's own app handles setup and settings.

Battery life and emergency power

The lock is powered by 10,000mAh rechargeable batteries. eufy says they typically last up to 14 months based on an average of 10 unlocks a day, so heavier use will mean shorter intervals between charges. A low-battery alert comes at 20%, and a power save mode is described as lasting up to one more month.

If the battery does run flat, eufy says you can hold a portable charger to the lock to unlock it. The listing notes this is for emergency power only and not for charging the battery, and that it doesn't allow data transfer.

Installation

The brand describes a 15-minute installation without drilling. That suggests the E31 is designed to fit an existing deadbolt hole, though door thickness, bolt type and the shape of your current hardware all matter. Confirm compatibility with the manual before you start, and follow its instructions for fitting and alignment so the bolt throws smoothly.

The unit measures about 6.9 x 2.8 x 1.3 inches (17.5 x 7 x 3.3 cm) as given in the listing. eufy also states 18 months of electronic coverage and 36 months of mechanical coverage, with phone, email and live chat support.

Who it suits

It suits households with several people coming and going: families, shared homes and anyone who wants to stop carrying keys. It also suits people already using Apple Home who want a lock that appears alongside their other devices. Rentals may need a landlord's agreement before changing a lock.

What to check before you buy

• Door and bolt: confirm your door thickness, backset and existing deadbolt are compatible, using the installation guide.
• Hub needs: check what you need for remote control with your platform.
• Wi-Fi and signal: make sure your door has a reliable connection to your hub or router.
• Fingerprints: consider whether everyone who needs access can register a print, or whether a code or key is better for some.
• Charging routine: plan how you'll recharge the battery and where you'll keep a portable charger.
• Local rules: check any building, lease or insurance requirements for door locks.

The short version

• A fingerprint deadbolt that also opens by keypad, app, voice or physical key.
• Matter, Apple Home, Google Home, Alexa and SmartThings support.
• 10,000mAh rechargeable battery, typically up to 14 months at 10 unlocks a day.
• Described as a 15-minute install without drilling.
• 18 months electronic and 36 months mechanical coverage stated.

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