Last Updated on September 27, 2026 by Caleb Warren
Choosing the best door lock brands for 2026 means looking beyond fingerprint scanners and smartphone apps. A dependable lock should fit your door, provide practical access options, and protect your home without making everyday entry difficult. TEEHO, eufy, and Philips offer different approaches, from simple keypad deadbolts to connected locks with remote access.
Quick Answer
For a straightforward keypad deadbolt, consider the TEEHO TE001. The eufy C220 adds fingerprint recognition and built-in Wi-Fi, while the Philips Wi-Fi models offer app control and multiple entry methods. Choose a deadbolt that fits your door, has suitable security credentials, and provides a dependable backup entry method.
Key Takeaways
- The TEEHO TE001 uses keypad codes without requiring an app or Wi-Fi connection.
- The eufy C220 offers fingerprint entry, remote access, and a manufacturer-estimated battery life of eight months.
- The eufy C30 uses physical keypad buttons rather than a fingerprint scanner.
- A smart lock does not automatically make a weak door, loose strike plate, or damaged frame secure.
- An interior reinforcement lock is an additional security device, not a replacement for an exterior deadbolt.
| Keypad Door Lock with Fingerprint and App Control | Ultimate Convenience | Keyless Entry: Fingerprint, app, passcodes, key fobs, mechanical keys, voice | Remote Control: Tuya app | Auto Lock: 10-99 seconds delay | VIEW LATEST PRICE | Read Our Analysis | |
| TEEHO TE001 Keyless Entry Door Lock with Keypad | Budget-Friendly Choice | Keyless Entry: Keypad passcodes, one-time PIN | Remote Control: Not available | Auto Lock: 10-99 seconds delay | VIEW LATEST PRICE | Read Our Analysis | |
| eufy Security Smart Lock C220 with Fingerprint Entry | Advanced Security | Keyless Entry: Fingerprint, app, keypad, physical key, Apple Watch, voice | Remote Control: eufy Security app | Auto Lock: User-defined settings | VIEW LATEST PRICE | Read Our Analysis | |
| Fingerprint Biometric Door Lock with Keypad Entry | Fast Access | Keyless Entry: Fingerprint, password, mechanical keys, IC card | Remote Control: Not specified | Auto Lock: Not specified | VIEW LATEST PRICE | Read Our Analysis | |
| Keyless Entry Smart Lock with Handle | User-Friendly Design | Keyless Entry: Keypad, physical keys | Remote Control: Not specified | Auto Lock: 5-99 seconds delay | VIEW LATEST PRICE | Read Our Analysis | |
| Home Security Door Reinforcement Lock for Kids Safety | Child Safety Focus | Keyless Entry: Not applicable (reinforcement lock) | Remote Control: Not applicable | Auto Lock: Not applicable | VIEW LATEST PRICE | Read Our Analysis | |
| Philips Wi-Fi Smart Lock with Keyless Entry | Stylish and Functional | Keyless Entry: App, fingerprints, PIN, keys, voice | Remote Control: Philips app | Auto Lock: 30-180 seconds delay | VIEW LATEST PRICE | Read Our Analysis | |
| eufy Security Smart Lock C30 with WiFi Keypad | Smart Integration | Keyless Entry: App, keypad, physical buttons, voice | Remote Control: eufy Security app | Auto Lock: User-defined settings | VIEW LATEST PRICE | Read Our Analysis | |
| Yamiry Keypad Smart Door Knob Lock | Compact and Reliable | Keyless Entry: Keypad, physical key | Remote Control: Not specified | Auto Lock: 5-99 seconds delay | VIEW LATEST PRICE | Read Our Analysis | |
| Philips WiFi Smart Keypad Deadbolt Lock with Alexa | High-Tech Features | Keyless Entry: App, keypad, keys, voice | Remote Control: Philips Home Access app | Auto Lock: 10-180 seconds delay | VIEW LATEST PRICE | Read Our Analysis |
These products serve different needs. Some replace a deadbolt, others include a handle, and one provides additional interior reinforcement. Compare their security features and installation requirements before choosing.
More Details on Our Top Picks
Keypad Door Lock with Fingerprint and App Control
This keypad door lock combines fingerprint recognition, app control, passcodes, key fobs, and mechanical keys. It is designed for households and shared properties that need several ways to manage entry.
The Tuya app supports access management and temporary codes for visitors. The advertised auto-lock delay ranges from 10 to 99 seconds, helping reduce the chance of leaving the door unlocked.
Its entry logs can also help property managers review access activity. However, confirm the exact Wi-Fi or gateway requirements before relying on remote control. Local app connectivity and internet-based control are not always the same feature.
Installation is described as straightforward, with no additional drilling for compatible doors. You should still use the required installation tools and check the existing door preparation.
- Keyless Entry:Fingerprint, app, passcodes, key fobs, mechanical keys, voice
- Remote Control:Tuya app
- Auto Lock:10-99 seconds delay
- Installation:Easy, no additional drilling for compatible doors
- Battery Life:Not specified
- Customer Support:Not specified
- Additional Feature:Voice unlock with Alexa
- Additional Feature:24/7 entry logs
- Additional Feature:Centralized property management
TEEHO TE001 Keyless Entry Door Lock with Keypad
The TEEHO TE001 suits homeowners who want a keypad deadbolt without depending on a smartphone or home internet connection. Its keypad allows you to create up to 20 access codes, including a one-time code for a visitor.
Its anti-peeping feature helps conceal your actual code when someone is watching. The adjustable auto-lock delay runs from 10 to 99 seconds, and a low-battery warning reminds you when replacement is needed.
According to the official TEEHO TE001 specifications, the lock has an IP54 weather-resistance rating, uses four AA batteries, and carries a 12-month warranty. TEEHO lists its material as zinc and estimates battery life at up to one year.
This is a keypad lock rather than a Wi-Fi smart lock. It does not offer app-based remote unlocking or fingerprint recognition, making it suitable for buyers who prefer a simpler electronic deadbolt.
- Keyless Entry:Keypad passcodes, one-time PIN
- Remote Control:Not available
- Auto Lock:10-99 seconds delay
- Installation:Simple, screwdriver needed
- Battery Life:Up to 1 year with 4 AA batteries; low-battery indicator
- Customer Support:1-year warranty, lifetime support
- Additional Feature:Anti-peeping code protection
- Additional Feature:Low battery indicator
- Additional Feature:20 access codes available
eufy Security Smart Lock C220 with Fingerprint Entry
The eufy Security Smart Lock C220 combines fingerprint access with built-in Wi-Fi. It allows you to manage the lock remotely through the eufy Security app without purchasing a separate bridge.
The fingerprint reader uses self-learning recognition technology. Eufy advertises fingerprint unlocking in less than one second, while the keypad, physical key, app, Apple Watch, and supported voice assistants provide other access options.
The manufacturer’s C220 specifications list approximately eight months of battery life using eight AA batteries. Actual life depends on how often you operate the lock and use its connected features.
Additional features include entry history, real-time notifications, an alarm for unusual opening attempts, and an IP53 weather-resistance rating. Eufy also identifies the C220 as BHMA Grade 3 certified.
Its advertised installation time is approximately 15 minutes on a compatible standard deadbolt opening. Before installation, make sure the deadbolt moves smoothly when the door is closed.
- Keyless Entry:Fingerprint, app, keypad, physical key, Apple Watch, voice
- Remote Control:eufy Security app
- Auto Lock:User-defined settings
- Installation:Easy, approximately 15 minutes, no drilling on compatible doors
- Battery Life:Approximately 8 months with 8 AA batteries
- Customer Support:18-month protection, 24/7 support
- Additional Feature:Self-learning AI technology
- Additional Feature:Multiple unlocking methods
- Additional Feature:Alarm for unusual attempts
Fingerprint Biometric Door Lock with Keypad Entry
This biometric lock offers four access methods: fingerprint recognition, password entry, mechanical keys, and an IC access card. It is intended for users who want quick entry without relying on a smartphone.
The product advertises fingerprint recognition in approximately 0.5 seconds and storage for up to 100 fingerprints. That capacity can be useful for shared spaces with several authorized users.
Its installation is described as requiring no additional drilling on compatible standard wooden doors. However, door thickness, latch dimensions, and handing must match the hardware.
Before using it on an exterior entrance, confirm its weather rating, battery backup, and security certification. A fingerprint reader alone does not establish the strength of the complete lock assembly.
- Keyless Entry:Fingerprint, password, mechanical keys, IC card
- Remote Control:Not specified
- Auto Lock:Not specified
- Installation:Easy, no additional drilling on compatible doors
- Battery Life:Not specified
- Customer Support:Not specified
- Additional Feature:4-IN-1 smart lock
- Additional Feature:100 fingerprints supported
- Additional Feature:Advertised recognition time of 0.5 seconds
Keyless Entry Smart Lock with Handle
The NICE DIGI Keyless Entry Smart Lock with Handle combines a keypad and handle in one assembly. It is designed for users who prefer entering a code instead of carrying a key.
The lock supports up to 20 access codes, including temporary guest codes. Its backlit keypad helps with nighttime entry, while vacation and silent modes offer additional control over daily operation.
The advertised auto-lock delay ranges from 5 to 99 seconds. It also offers a mechanical key option, which can be helpful if the electronic system becomes unavailable.
Installation is advertised as taking approximately five minutes with a screwdriver on a compatible door. This estimate assumes the existing holes and latch preparation match the replacement hardware.
The product lists a 30-day money-back guarantee and two-year coverage. Review the warranty terms for exclusions, registration requirements, and replacement procedures.
- Keyless Entry:Keypad, physical keys
- Remote Control:Not specified
- Auto Lock:5-99 seconds delay
- Installation:Advertised 5-minute installation with screwdriver
- Battery Life:Up to 1 year with 4 AA batteries
- Customer Support:30-day guarantee, 2-year coverage
- Additional Feature:Backlit keypad for night
- Additional Feature:Vacation mode feature
- Additional Feature:Silent mode option
Home Security Door Reinforcement Lock for Kids Safety
This reinforcement lock provides an additional layer of protection for inward-swinging doors. It is especially relevant for households that want to make it harder for young children to open an exterior door without supervision.
The product advertises resistance to 800 pounds of force and describes itself as twelve times stronger than a typical deadbolt. These are product-specific claims, not a substitute for independently verified security certification.
Its spring-loaded mechanism is designed to resist accidental opening. Installation requires suitable screws and tools, including a drill or power screwdriver, and depends on the strength of the door frame.
The device lists five-year after-sale service and can be released manually from inside. However, it cannot be operated from outside like a normal deadbolt.
Use it as additional reinforcement rather than the only lock on a main entrance. Consider whether every household member can release it during an emergency.
- Keyless Entry:Not applicable (reinforcement lock)
- Remote Control:Not applicable
- Auto Lock:Not applicable
- Installation:Requires power screwdriver and drill
- Battery Life:Not applicable
- Customer Support:5-year service
- Additional Feature:Advertised resistance to 800 lbs of force
- Additional Feature:Spring-loaded design
- Additional Feature:No tools required for opening
Philips Wi-Fi Smart Lock with Keyless Entry
This Philips Wi-Fi smart lock combines fingerprint access, PIN codes, traditional keys, and smartphone management. It is designed for homeowners who want both connected features and several ways to enter.
Through the Philips app, users can manage access, review notifications, and control supported lock functions remotely. The product also advertises voice integration with Alexa and Google Assistant.
Fingerprint recognition is advertised at approximately 0.3 seconds, while the adjustable auto-lock delay ranges from 30 to 180 seconds. Battery life is listed at up to six months using AA batteries.
Before purchasing, confirm the precise model number and app compatibility. Philips sells several smart deadbolts with different connectivity and access features, so specifications should not be assumed to apply across every model.
- Keyless Entry:App, fingerprints, PIN, keys, voice
- Remote Control:Philips app
- Auto Lock:30-180 seconds delay
- Installation:Straightforward, screwdriver
- Battery Life:Up to 6 months with AA batteries
- Customer Support:24/7 email support
- Additional Feature:Advertised 0.3-second fingerprint recognition
- Additional Feature:Unlimited one-time PIN codes
- Additional Feature:Coordinated design with handle
eufy Security Smart Lock C30 with WiFi Keypad
The eufy Security Smart Lock C30 offers built-in Wi-Fi, a physical-button keypad, app control, and mechanical key access. Unlike the C220, it does not include a fingerprint scanner.
Its physical buttons are intended to provide dependable input without relying on a touchscreen. The eufy Security app supports remote control, access management, notifications, and entry history.
According to the official C30 specifications, the lock uses four AA batteries and offers approximately five months of battery life, depending on usage. The manufacturer also confirms IPX3 water resistance and an operating temperature range of -22°F to 158°F.
The C30 has adjustable auto-lock settings and wrong-try protection, which temporarily restricts access after repeated incorrect attempts. It also supports up to 100 passcodes.
Eufy states that installation takes approximately 15 minutes on compatible doors. The C30 does not fit a rounded latch hole, so examine the door preparation before purchase.
Apple HomeKit, IFTTT, and Matter compatibility are not listed as supported features for this model.
- Keyless Entry:App, keypad, physical buttons, voice
- Remote Control:eufy Security app
- Auto Lock:User-defined settings
- Installation:Approximately 15-minute DIY installation
- Battery Life:Up to 5 months with 4 AA batteries
- Customer Support:18-month protection, 24/7 support
- Additional Feature:Wrong-try protection feature
- Additional Feature:No bridge required
- Additional Feature:Real-time notifications available
Yamiry Keypad Smart Door Knob Lock
The Yamiry Keypad Smart Door Knob Lock combines a digital keypad with a traditional key option. Its compact design suits buyers who prefer a handle-style lock rather than a separate smart deadbolt.
The lock supports up to 20 programmable codes and includes a backlit keypad for nighttime entry. Its auto-lock delay can be adjusted between 5 and 99 seconds.
The aluminum alloy construction and IP54 weather-resistance rating are intended to support everyday use. A low-battery indicator provides a reminder before the electronic functions stop working.
Installation is advertised as taking less than 15 minutes with a screwdriver on compatible doors. The product also lists a 30-day money-back guarantee and one-year coverage.
For a main exterior entrance, check whether the complete lock assembly provides the deadbolt protection and security rating you need.
- Keyless Entry:Keypad, physical key
- Remote Control:Not specified
- Auto Lock:5-99 seconds delay
- Installation:Less than 15 minutes, screwdriver
- Battery Life:Low battery indicator
- Customer Support:30-day guarantee, 1-year coverage
- Additional Feature:Anti-prying user code
- Additional Feature:20 programmable codes
- Additional Feature:Weather-resistant (IP54)
Philips WiFi Smart Keypad Deadbolt Lock with Alexa
This Philips Wi-Fi keypad deadbolt is designed for homeowners who want remote management without a separate Wi-Fi bridge. It combines app control, keypad entry, mechanical keys, and supported voice commands.
The Philips Home Access app allows users to manage entry and share access with family members or visitors. The product advertises support for up to 100 custom passwords.
Its adjustable auto-lock delay ranges from 10 to 180 seconds. The lock also offers incorrect-attempt alerts and a stated resistance of 2200N.
Battery life is listed at up to six months with eight AA batteries. Installation is advertised as taking approximately 15 minutes on a compatible door.
The product lists a 12-month warranty and 24/7 email support.
Philips also offers Wi-Fi smart deadbolts with published ANSI/BHMA Grade 3 specifications. Check the exact model number before comparing security grades, battery requirements, or supported access methods.
- Keyless Entry:App, keypad, keys, voice
- Remote Control:Philips Home Access app
- Auto Lock:10-180 seconds delay
- Installation:About 15 minutes, screwdriver
- Battery Life:Up to 6 months with 8 AA batteries
- Customer Support:12-month warranty, 24/7 email support
- Additional Feature:100 custom passwords supported
- Additional Feature:Alarm for incorrect attempts
- Additional Feature:2200N pressure resistance
Factors to Consider When Choosing Door Lock Brands in 2026
A good door lock should provide the right balance of security, convenience, durability, and cost. Start by deciding whether you need a conventional deadbolt, a keypad lock, or a connected smart lock.
Then compare the complete lock assembly, installation requirements, battery backup, and access controls. A long feature list matters less if the lock does not fit your door or operate reliably.
Security Features Assessment
Security starts with the physical lock, not its electronic features. Fingerprint recognition and app control add convenience, but they do not replace a strong deadbolt, properly installed strike plate, or solid door frame.
Look for tested hardware and a documented security grade. The ANSI/BHMA A156.40-2025 residential deadbolt standard establishes performance requirements covering durability, security, and finish.
Manufacturers may advertise features such as 99.99% fingerprint recognition accuracy, anti-tamper alarms, or resistance to a stated force. Such claims should be considered alongside independent certification, rather than treated as proof of complete protection.
Useful electronic security features include:
- Auto-lock: Secures the bolt after a selected delay.
- Wrong-try protection: Restricts repeated incorrect access attempts.
- Low-battery alerts: Warn you before electronic access becomes unavailable.
- Activity history: Records supported lock and access events.
- Backup entry: Provides another method when the primary method fails.
Remember that an automatic locking motor cannot guarantee security if the door is open, misaligned, or unable to extend its bolt fully.
Installation Ease Factors
Many electronic deadbolts can replace existing hardware using a screwdriver. However, installation time depends on the door’s condition and whether its dimensions match the new lock.
Before purchasing, check these measurements and features:
- Door thickness and existing bore-hole diameter.
- Backset, which is the distance from the door edge to the center of the lock hole.
- Latch opening and strike-plate alignment.
- Clearance for the interior battery housing.
- Left- or right-handed installation requirements.
A lock advertised as a 15-minute installation may take longer if the door needs adjustment. Check that the bolt extends and retracts freely before completing electronic calibration.
Smart Technology Integration
Smart-home compatibility varies by model, even within the same brand. A lock that works with Alexa does not necessarily support Apple Home, Google Home, Matter, or another connected system.
Built-in Wi-Fi models can provide remote access without a separate bridge. Bluetooth-only models generally require your phone to be nearby unless they use an additional hub or compatible connected accessory.
If you plan to control several properties, compare the app’s ability to assign users, create temporary codes, review activity, and revoke access.
Also consider what happens during an internet outage. A connected lock may continue accepting locally stored PINs or fingerprints even when remote app functions are unavailable.
Battery Life Considerations
Battery life depends on the lock’s electronics, wireless connectivity, motor use, temperature, and frequency of operation. Manufacturer estimates are useful for comparison, but actual results vary.
| Lock | Advertised Battery Life | Battery Type |
|---|---|---|
| TEEHO TE001 | Up to 1 year | 4 AA |
| eufy C220 | Approximately 8 months | 8 AA |
| eufy C30 | Approximately 5 months | 4 AA |
| Philips Wi-Fi Keypad Deadbolt | Up to 6 months | 8 AA, according to the listed model |
Replace batteries when the low-power warning appears. Keep a compatible backup entry method available, and avoid mixing old and new batteries unless the manufacturer specifically permits it.
Access Control Options
Choose access methods based on who uses the door and how often visitors need entry. A family may prefer fingerprints and PINs, while a rental property may benefit from temporary codes and access history.
Fingerprint recognition is convenient because you do not need to remember a code. However, users should have another entry method available if a sensor cannot read a finger.
Keypads allow you to issue separate codes and remove them when they are no longer needed. An app adds remote administration, while a mechanical key provides a familiar backup on models that include one.
For guest access, use individual or temporary credentials rather than sharing your main household code.
Durability and Weather Resistance
Exterior locks must withstand regular handling, temperature changes, and exposure to moisture. Look for durable metal construction, protective finishes, and a weather rating appropriate for your entrance.
IP54 and IPX3 describe different levels of protection. IP54 indicates limited dust ingress protection and resistance to water splashes. IPX3 indicates protection against spraying water but does not provide a dust-protection rating.
For example, the eufy C30 lists IPX3 protection and an operating range of -22°F to 158°F. The TEEHO TE001 lists IP54 protection.
Even a weather-resistant lock benefits from suitable door protection. Check the manufacturer’s installation requirements before exposing its interior housing or electronic connections to outdoor conditions.
Warranty and Support Availability
Warranty coverage matters because electronic locks contain motors, sensors, circuit boards, and other components that can fail. Compare the actual warranty terms rather than judging support by the advertised duration alone.
Look for coverage details addressing manufacturing defects, electronics, replacement parts, and installation problems. Also confirm whether support is available by phone, email, or live chat.
Manufacturers such as TEEHO and eufy publish product-specific warranty information. Remember that a money-back guarantee and a manufacturer’s limited warranty are different protections.
Price and Value Comparison
The best value depends on whether you need basic keypad access or connected features. A lower-priced electronic deadbolt may provide everything you need without ongoing dependence on an app.
Compare the purchase price with any additional costs for installation, batteries, accessories, or a connectivity bridge. Review whether essential functions require a subscription.
Pay more for features you will actually use, such as remote access, individual guest codes, or fingerprint recognition. A long feature list does not automatically mean a more secure lock.
How to Keep a Smart Door Lock Secure
A smart lock needs both physical maintenance and digital protection. Its security depends on the door hardware, installed software, account settings, and the people authorized to use it.
The Federal Trade Commission’s smart-device security guidance recommends changing default credentials, using two-factor authentication where available, installing updates, and disabling unnecessary connected features.
Use this practical checklist:
- Replace the default administrator code during setup.
- Use a unique password for the lock’s account.
- Enable two-factor authentication when supported.
- Install firmware and app security updates.
- Remove old guest codes and unused users.
- Review unusual access activity.
- Test the backup entry method periodically.
If you move into a home with an existing smart lock, reset it and establish your own administrator credentials. Do not assume that previous occupants have lost access.
Door Reinforcement and Emergency Exit Safety
Additional door reinforcement can improve resistance to forced entry, but it must not prevent occupants from escaping quickly. This is especially important in homes with children, older adults, or anyone who may need assistance.
Warning: Never install a reinforcement lock that prevents occupants from opening an emergency exit quickly. Everyone in the household should understand how to release the device. Check applicable building and fire-safety requirements before adding extra locks.
The U.S. Fire Administration’s escape-planning guidance emphasizes keeping exits accessible and using quick-release mechanisms for security barriers.
For a main entrance, consider the complete door assembly. A well-installed deadbolt, suitable strike plate, solid frame, and properly functioning hinges work together to resist forced entry.
Frequently Asked Questions
How Do I Install a Smart Door Lock?
Remove the existing lock according to its instructions and install the replacement hardware using the manufacturer’s guide. Check the latch and strike alignment before adding batteries or completing setup. Then program the lock and test every access method with the door open before testing it closed.
Are Keyless Door Locks Safe From Hacking?
Keyless locks can provide effective security, but connected models may have digital vulnerabilities. Choose products with documented security features, keep firmware updated, use unique credentials, and enable two-factor authentication when available. A lock’s physical security and account protection both matter.
What Is the Average Lifespan of a Door Lock?
A typical door lock may last about 7 to 10 years, depending on its construction, use, environment, and maintenance. Electronic components may require attention sooner. Replace a lock if its bolt sticks, its mechanism becomes unreliable, or its security is compromised.
Can I Use a Smart Lock With an Existing Deadbolt?
Yes, some retrofit smart locks replace only the interior portion of an existing deadbolt. Others require replacing the complete lock assembly. Check the model’s compatibility with your current deadbolt, door thickness, and interior clearance before purchasing.
How Do I Reset My Keypad Door Lock?
Follow the reset procedure for your exact model. Many keypad locks use a reset or programming button inside the battery compartment, but the sequence differs by manufacturer. A factory reset may erase stored codes and settings, so keep the door open until you have completed reprogramming and tested the lock.
What Happens if a Smart Lock’s Battery Dies?
Most battery-powered smart locks stop operating electronically when their batteries are exhausted. Models with mechanical keys may still open normally. Others provide emergency power contacts or ports. The available recovery method depends on the model, so learn it before a battery failure occurs.
Do Smart Locks Work Without Wi-Fi?
Many smart locks continue working through locally stored PINs, fingerprints, or mechanical keys without Wi-Fi. However, remote control, notifications, and some app functions may become unavailable. The TEEHO TE001 does not require Wi-Fi, while the eufy C220 and C30 use Wi-Fi for connected features.
Is a Smart Door Lock Better Than a Traditional Deadbolt?
A smart lock offers additional convenience through features such as keyless entry, temporary codes, and remote management. However, those features do not automatically make it physically stronger than a traditional deadbolt. Compare tested security ratings, installation quality, and backup access before deciding.
Conclusion
The right door lock depends on how you use your entrance. TEEHO offers simple keypad access, eufy provides connected options with or without fingerprints, and Philips combines smart access with a range of deadbolt designs.
Start with the lock’s physical security and door compatibility. Then choose the access methods, battery arrangement, and connected features that suit your household. Finally, install the hardware correctly and test both normal and backup entry before relying on it.
Sources
- TEEHO — TE001 Keypad Deadbolt: Access codes, materials, weather rating, batteries, and warranty.
- eufy — Smart Lock C220: Unlocking methods, battery life, installation, security grade, and connectivity.
- eufy — Smart Lock C30: Battery life, weather resistance, connectivity, access codes, and compatibility.
- Philips — 4000 Series Wi-Fi Smart Deadbolt: Official smart-lock features and published security rating.
- ANSI/BHMA A156.40-2025: Residential deadbolt performance requirements.
- Federal Trade Commission — Securing Internet-Connected Devices: Account protection, device updates, and connected-home security.
- U.S. Fire Administration — Make and Practice a Plan: Emergency escape and exit safety.
