Can Smart Locks Work During a Power Outage? Yes.

“Will my smart lock still work during a power outage?” “What happens if the smart lock itself runs out of battery?” These are common concerns before buying a smart lock.

The answer is: Yes, you can still unlock the door. Smart locks are powered by their own internal batteries, so they do not rely on your home’s electricity supply.

What If the Smart Lock Itself Runs Out of Battery?

Compared with a household power outage, a completely drained smart lock battery is the situation you actually need to prepare for.

If you forget to replace the batteries and the lock runs out of power, there are three backup options:

1. Use the Mechanical Key

Smart locks with a mechanical key cylinder provide a straightforward backup option. If the electronic system has completely lost power, simply use the physical key to unlock the door.

Tip: Keep at least one spare key somewhere accessible, such as in your car, office, or with a trusted family member. Avoid keeping every spare key inside your home.

2. Use a Power Bank for Type-C Emergency Power

Some smart locks include an external emergency power port. SGUDA smart locks with Type-C emergency power support can be temporarily powered using a compatible external power source.

Connect a power bank to the emergency power port, unlock the door using your normal access method, and replace the internal batteries once you are inside.

3. Replace the Batteries When You Receive a Low-Battery Alert

Before the batteries are completely drained, the smart lock can provide a low-battery warning, such as an audible alert or an App notification, depending on the model.

Replacing the batteries as soon as you receive the warning is the simplest way to avoid being locked out.

Home Power Outage ≠ Dead Smart Lock Battery

A household power outage does not mean your smart lock has lost power.

As long as the lock’s internal batteries are working, supported local unlocking methods can continue to operate. What may be temporarily affected is your home network—and therefore features that depend on an internet connection.

When choosing a smart lock, convenience is important, but backup access is just as essential for everyday reliability.

SGUDA smart locks are designed with backup options such as low-battery alerts, emergency power, and mechanical key access, depending on the model, helping you stay prepared even when unexpected power issues occur.

Choosing a smart lock isn’t just about finding the model with the most features. The right lock should fit your door, provide reliable security, and match how you actually use it every day.

Here are five key things to consider before buying a smart lock.

1. Choose the Right Lock Type

Before comparing smart features, start with the basics: what type of lock does your door need?

Common smart lock types include:

• Deadbolt locks – Commonly used for residential entrance doors.
• Lever locks – Combine the lock and handle into one unit.
• Mortise locks – Installed inside the door and commonly found in commercial or higher-security applications.

Deadbolt smart locks can also vary in how they are installed. Some attach to an existing deadbolt, some replace only the interior portion, while others replace the complete deadbolt.

Always check your door type, thickness, dimensions, and existing lock configuration before purchasing.

2. Check Both Physical and Digital Security

A smart lock needs to protect against both physical attacks and digital threats.

For physical security, look for recognized standards such as ANSI/BHMA ratings, which evaluate factors such as durability and lock performance.

For connected smart locks, cybersecurity is equally important. Check how the manufacturer protects communication between the lock, App, and cloud services.

Technologies such as AES-128 encryption and TLS/SSL can help protect transmitted data and prevent unauthorized access.

3. Consider How the Lock Connects

Connectivity determines what your smart lock can do.

A lock with built-in Wi-Fi can provide remote features without requiring a separate hub. Depending on the product, this may include remote unlocking, user management, access records, and other App-based controls.

However, connectivity can also affect battery consumption, so consider both remote functionality and power requirements rather than choosing based on Wi-Fi alone.

4. Choose the Access Methods You Actually Need

More unlocking methods do not automatically mean a better smart lock.

Consider who will use the door and how often.

Common access methods include fingerprint, passcode, RFID card, smartphone App, Bluetooth, smartwatch, voice assistant, and mechanical key.

For example, fingerprint or card access may be convenient for frequently returning users, while temporary passcodes can be useful for guests, rentals, or other short-term access.

5. Think About Everyday Ownership

A smart lock is something you may use several times every day, so long-term usability matters.

Before buying, consider:

• Battery life and low-battery alerts
• Emergency power options
• Mechanical key backup
• User and permission management
• Access history
• App usability
• Installation requirements
• Warranty and after-sales support

The best smart lock is not necessarily the one with the longest feature list. It is the one that provides the right security, access methods, connectivity, and management features for your specific space and users.

Looking for a Smart Lock That Balances Security and Convenience? Meet SGUDA

When choosing a smart lock, convenient access is only part of the equation. Physical security, cybersecurity, user management, and everyday usability should all be considered.

Developed by a team in Taiwan, SGUDA smart locks combine decades of lock manufacturing experience with smart technology to provide access solutions for homes, offices, and rental properties.

For physical security, SGUDA smart locks include an ANSI Grade 3 Deadbolt. For digital security, SGUDA uses AES-128 encryption and TLS/SSL communication security technologies to help protect data transmission and reduce the risk of unauthorized access.

Depending on the model, SGUDA offers access methods including fingerprint, passcode, RFID card, smartphone App, Bluetooth, mechanical key, smartwatch, and voice assistant. App-connected models also support features such as remote operation, user access management, and activity logs—helping users manage not only how a door is unlocked, but also how access is controlled.

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A home equipped with modern technology and connected devices is what many people imagine when thinking about a smart home.

Lights, speakers, TVs, screens, doors, and even door locks can now be automated or controlled through smart devices.

There are many different types of smart door locks on the market, including electronic deadbolts, keyless smart locks, and touchscreen keypad deadbolts. Choosing the right smart lock for your home requires understanding your existing door and lock first.

Here are five things you should know before choosing and installing a smart door lock:

1. Door Lock Types
2. Exterior Door Types and Materials
3. How to Measure Your Door
4. Smart Door Lock Types
5. Features of Smart Door Locks

1. Door Lock Types

Knob Lock

Knob locks are one of the most common types of locks and are often found on interior doors such as bathrooms and backyard doors.

Because the locking mechanism is located inside the knob, this type of lock can be relatively easy to damage with tools such as a wrench or hammer. Therefore, it is generally not recommended as the primary security lock for an exterior door.

One solution is to add a deadbolt smart lock or replace the knob lock with a smart lever lock.

Lever Handle Lock

Lever handle locks are commonly used on interior doors and are easy to grasp and operate.

Smart lever locks and deadbolt smart door locks may be suitable options for doors using this type of hardware.

Mortise Lock

A mortise lock is installed inside a pocket, known as a mortise, cut into the edge of the door.

Because the lock body is installed inside the door itself, replacing or upgrading a mortise lock usually requires checking the existing door dimensions and lock specifications.

Deadbolt Door Lock

Deadbolt locks are among the easiest types to upgrade to a smart lock.

For homeowners interested in DIY installation, many smart deadbolts are designed to use existing deadbolt holes and include quick installation instructions.

Cylinder Locks

There are several types of cylinder locks, including rim cylinders, mortise cylinders, and European cylinders.

Depending on the existing door configuration, a deadbolt smart lock may be suitable for this type of installation.

2. Exterior Door Types and Materials

Before purchasing an electronic door lock or smart keypad lock, make sure your door material and construction are compatible with the smart lock.

Common exterior door types include:

• Panel doors
• Double-leaf wooden doors
• Storm doors
• Windowed doors

Common exterior door materials include:

• Steel
• Wood
• Fiberglass
• Aluminum

3. How to Measure Your Door

The following measurements were originally provided to determine whether a door was compatible with the SGUDA U-Lock touchscreen smart deadbolt.

A. Door Width

Measure from the edge of the door.

The available door surface should be more than 10 cm wide.

B. Door Thickness

Door thickness should be greater than 1⅜ inches.

C. Latch Dimensions

Measure the width and length of the existing latch.

D. Distance Between Main Door and Exterior Gate

If there is another gate or security door outside the main door, the gap between the two doors should be greater than 4 inches.

E. Deadbolt Installation Measurements

For SGUDA U-Lock installation, check:

• Backset
• Door thickness
• Latch dimensions
• Required deadbolt hole position

4. Smart Door Lock Types

Deadbolt

A smart deadbolt is one of the easiest types of smart locks to install.

If your door already has a traditional deadbolt, upgrading is relatively simple because the existing hole can often be reused.

Example: SGUDA U-Lock smart deadbolt door lock.

Lever

Smart lever locks are suitable for replacing traditional lever locks or knob locks.

In many cases, no additional hole needs to be drilled during installation.

Mortise

Mortise smart locks are commonly used when replacing or upgrading an existing mortise lock system.

Because mortise systems vary considerably in size and construction, compatibility with the existing door and lock body should be confirmed before installation.

5. Features of Smart Door Locks

Smart locks offer different levels of security, functions, and entry methods depending on the product and user’s requirements.

They can generally be divided into three levels:

A. Basic

Common entry methods include:

• Key card
• Passcode
• Mechanical key

B. Intermediate

Additional entry methods may include:

• Key card
• Passcode
• Mechanical key
• Bluetooth
• Fingerprint

C. Advanced

Advanced connected smart locks may provide:

• Built-in Wi-Fi
• Activity logs
• Remote lock and unlock
• User access management

These features allow users to manage their doors remotely and monitor access through a connected smart lock system.

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