What Happens To Smart Locks When Power Goes Out

When the power is cut off, the smart lock will not automatically open. A legitimate smart lock maintains its locked state during the power outage, which is a requirement of safety standards. But because the electronic part cannot work, you may be blocked outside the door, so you need to master emergency unlocking methods.

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What happens after a power outage?

1.1 The lock will not pop open on its own: The electronic part of the smart lock is only responsible for verifying identity (fingerprint, password, etc.), and the actual control of the lock tongue is the independent mechanical structure or the motor that automatically resets after power failure. When the battery is depleted, the lock tongue will remain in its original locked state and will not automatically open the door due to lack of power.

1.2 Electronic unlocking function failure: Fingerprint, password, facial recognition, NFC, and APP remote unlocking all require power, and these functions cannot be used after power failure. ‌‌

Emergency unlocking method

Power bank emergency

2.1 power supply (most recommended): The vast majority of smart locks have Type-C emergency power ports on the front, bottom, or side. Insert the power bank and wait for 5-15 seconds. After the screen lights up, use your fingerprint or password to unlock.

‌‌2.2 Mechanical key (guaranteed solution): All compliant smart locks are equipped with a physical keyhole, usually hidden at the bottom of the panel or below the handle. About 70% of the keyhole is located directly below the lock body, and you can see the circular cover plate when squatting down.

Spare keys must be kept in a safe location outside the home, such as in the car, office, or parents' house, and not all locked indoors. ‌‌

2.3 Other emergency measures: Some door locks that support wireless reverse charging (such as Huili Smart Door Lock) can be powered by using a mobile phone nearby; Some older models support 9V block battery contact power supply; Some models also have an emergency start button. ‌‌

How to avoid being locked out of the door

3.1 Pay attention to low battery warning: When the battery level is below 20%, the door lock will issue a "beep" alarm or the panel red light will flash. When the battery level is below 15%, the networked door lock will push an APP reminder. After the low battery alarm, the lock can still be unlocked about 30-50 times. It is recommended to replace the battery within 3 days.

3.2 Develop a regular inspection habit: Check the battery contacts for oxidation or leakage every 3-4 months, and shorten the replacement cycle to 4-5 months in low-temperature areas during winter.

3.3 Don't worry about a whole house power outage: Smart locks are usually powered independently by dry batteries or lithium batteries, and do not rely on household electricity. Therefore, power outages and lock failures are two different things - as long as the lock itself has electricity, a whole house power outage will not affect normal unlocking.

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If you are considering changing the lock, you can prioritize models that support Type-C emergency power supply and low battery multiple reminders, such as the Huili smart door lock, which has a more stable battery life and a lower probability of being locked. ‌‌