How to Charge a Smart Lock

Smart locks are a game-changer for home security, offering keyless entry, remote access, and seamless integration with smart home systems. But like any electronic device, they need power to function. While many smart locks run on replaceable batteries, some newer models come with rechargeable batteries—meaning you’ll need to charge them periodically.

If your smart lock is showing low-battery warnings, acting sluggish, or refusing to connect, it might be time for a recharge. This guide will walk you through how to charge a smart lock properly, ensuring you never get locked out due to a dead battery.

Why Charging Your Smart Lock Matters

Before we dive into the steps, let’s quickly cover why keeping your smart lock charged is important:

Avoid Lockouts – A dead smart lock could leave you stranded outside your home.
Maintain Security – Weak batteries may cause malfunctions, making the lock less reliable.
Extend Device Lifespan – Proper charging habits keep your lock running smoothly for years.

Most rechargeable smart locks use lithium-ion batteries (like those in smartphones), while others rely on standard AA/AAA batteries. Always check your user manual to confirm your lock’s power source.

Step 1: Determine If Your Smart Lock Is Rechargeable

Not all smart locks are rechargeable—many use disposable batteries. Here’s how to tell:

Check the manual – Look for terms like “rechargeable,” “USB charging,” or “built-in battery.”
Look for a charging port – Some locks have a micro-USB or USB-C port.
Check the app – Many smart locks show battery status and charging instructions in their app.

If your lock doesn’t have a charging port, it likely uses replaceable batteries—in that case, check our guide on How to Change a Smart Lock Battery.

Step 2: Gather the Right Charging Equipment

If your smart lock is rechargeable, you’ll need:

The correct charging cable (usually USB-C or micro-USB—check your manual)
A power source (USB wall adapter, power bank, or laptop)
A backup key or alternative entry method (in case the lock dies during charging)

Pro Tip: Avoid cheap, off-brand chargers—they can damage the battery. Stick with reputable brands like Keyplus.

Step 3: Locate the Charging Port on Your Smart Lock

Rechargeable smart locks typically have one of two charging methods:

1. Direct Charging (Via USB Port)

  • Found on locks like Keyplus Smart Lock.

  • The port is usually hidden under a rubber flap or on the bottom of the lock.

2. Battery Pack Removal (For Locks with Swappable Rechargeable Batteries)

  • Some models allow you to remove the internal battery and charge it separately.

If you can’t find the port, check the user manual or manufacturer’s website.

Step 4: Charge Your Smart Lock

Option 1: Charging via USB Cable

  1. Open the charging port cover (if applicable).

  2. Plug in the USB cable securely.

  3. Connect to a power source (wall adapter, laptop, or power bank).

  4. Wait for a charging indicator (LED light or app notification).

  5. Leave it charging (usually 2-4 hours for a full charge).

Warning: Never force the cable—if it doesn’t fit, you might have the wrong port type.

Option 2: Charging a Removable Battery Pack

  1. Remove the battery pack (check the manual for instructions).

  2. Plug it into the provided charging dock (or use a USB cable, if compatible).

  3. Wait until fully charged (LED light often turns green).

  4. Reinsert the battery into the lock.

Step 5: Test the Lock After Charging

Once charging is complete:

  1. Unplug the cable and close the charging port.

  2. Check the lock’s response – Does the keypad light up?

  3. Test locking/unlocking – Manually and via the app.

  4. Verify battery status in the app (if available).

If the lock still isn’t working:

  • Try a hard reset (see the manual).

  • Ensure the charging cable is undamaged.

  • Contact customer support if issues persist.

How Long Does a Smart Lock Battery Last After Charging?

It depends on usage, but here’s a general estimate:

Smart Lock Type Battery Life (Full Charge)
Wi-Fi Enabled Locks 2-6 months
Bluetooth-Only Locks 6-12 months
Zigbee/Z-Wave Locks 6-12 months

Tip: Turning off unnecessary features (like Wi-Fi when not needed) can extend battery life.

Smart Lock Charging Tips for Best Performance

Use a High-Quality Charger – Cheap chargers can overheat or damage the battery.
Charge Before It Dies – Don’t wait for a 0% battery; recharge at 20-30%.
Keep a Power Bank Handy – Useful for emergency charging if the lock dies.
Check for Firmware Updates – Some locks optimize battery usage via updates.

What to Do If Your Smart Lock Dies Completely

If your lock won’t charge or turn on:

  1. Try a different cable/power source.

  2. Use the physical key (if your lock has one).

  3. Check for warranty coverage (many brands offer replacements).

  4. Call a locksmith if you’re locked out.

Final Thoughts

Charging a smart lock is simple once you know how, and staying proactive prevents unexpected lockouts. Whether your lock charges via USB or removable battery, following these steps will keep it running smoothly.

Did this guide help you? Share it with a friend or neighbor who uses smart locks!

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