When the lights go out, the first thought is often about safety and access. Smart locks might seem like they would stop working without electricity, but that’s not the case. Most smart locks keep working during a power outage because they run on batteries, not your home’s electrical system.
Even if the Wi-Fi goes down, the lock itself still functions. You can lock and unlock the door as usual, though features like remote control or app alerts may pause until the internet comes back. Many models also include a physical keyhole or an emergency power option, so entry is never fully dependent on electricity.
Knowing how a smart lock behaves during a blackout helps prevent surprises. By understanding battery life, backup options, and manual overrides, anyone using a smart home system can feel confident that access and security remain steady when power is lost.
1. Most Smart Locks Run on Batteries
- The majority of smart locks are battery-powered, not directly dependent on your home’s electricity.
- They typically use AA batteries or rechargeable lithium batteries.
- Because of this, they continue working normally during a power outage (source: ThingLabs).
✅ You’ll still be able to lock and unlock your door using the keypad, app (if Bluetooth-based), or even a physical key.
2. Features That May Stop Working
While the lock itself still functions, some advanced features may be affected:
- Wi-Fi–based remote access: If your home’s router loses power, you won’t be able to lock/unlock remotely via the internet.
- Smart home integrations (like Alexa or Google Home) won’t respond until power and internet are restored.
In short: local access works, but remote access may not.
3. Hardwired Smart Locks Are Rare but Different
- A few models are hardwired into the home’s electrical system.
- These usually come with a backup battery to keep them functional during outages (source: SafeHome).
- Without backup power, they could stop working until electricity is restored.
4. Backup Options for Emergencies
Smart lock manufacturers build in safeguards so you don’t get locked out:
- Physical key override: Many models still allow you to use a traditional key.
- External battery terminals: Some locks let you temporarily power them with a 9V battery from the outside.
- Battery backup packs: Optional accessories can keep your lock powered for hours or days.
5. Best Practices to Stay Prepared
- Check battery levels regularly – most locks send alerts (via app or LED indicator) when batteries are low.
- Keep spare batteries handy – especially if your lock uses standard AA batteries.
- Have a backup entry method – whether that’s a physical key, keypad code, or external battery option.
- Consider a UPS for your Wi-Fi router – if you rely heavily on remote access.
✅ Bottom Line
During a power outage, battery-powered smart locks will still work normally, but you may lose remote features if your internet goes down. Hardwired locks need a backup power source, but most still include safety features like keys or external battery access.
As long as you keep your lock’s batteries fresh and know your backup options, you won’t have to worry about being locked out when the lights go out.
Key Takeaways
- Smart locks keep working during power outages with battery power
- Remote features may stop without Wi-Fi, but basic locking still works
- Manual keys or backup power ensure access if batteries die
Smart locks are becoming increasingly popular for their convenience, remote access, and added security features. But a common concern homeowners have is: what if the power goes out?
The good news is that most smart locks are designed with this in mind. Here’s what you need to know:
Frequently Asked Questions
Smart locks continue to work during outages because they use internal batteries. Some models also include manual overrides or backup options to ensure access when standard power sources are unavailable.
Do smart locks have a backup power source?
Most smart locks run on replaceable or rechargeable batteries. Some hardwired models include a built-in backup battery. A few designs allow temporary power from a 9-volt battery when the main batteries are drained.
How does a power outage affect the functionality of smart locks?
The lock mechanism still works during an outage since it relies on batteries, not household electricity. Features that need Wi-Fi, like mobile alerts or remote unlocking, stop working until the internet connection returns.
Can smart locks still be manually operated during a power failure?
Yes. Many smart locks include a traditional keyhole. Others provide keypad entry or temporary charging through an external battery. These options ensure the door can still be unlocked if the lock’s batteries die.
What are the security implications of a smart lock during a power outage?
The lock continues to secure the door since the core function does not depend on grid power. The main difference is the lack of remote monitoring or alerts, which reduces awareness but does not weaken the physical lock.
How long will a smart lock remain operational without external power?
Battery life varies by model and usage. Many smart locks last several months to a year on a fresh set of batteries. Frequent use of wireless features like Wi-Fi or Bluetooth can shorten that lifespan.
Are there any smart lock features specifically designed for power outage situations?
Yes. Low-battery warnings, backup batteries, and emergency charging points are common. Some models also notify users through an app before the battery dies, giving time to replace or recharge it.
