How to Charge Eufy Security Card

Charging your Eufy Security Card is simple, but doing it correctly ensures long-term performance and safety. This guide walks you through the process, from identifying your card model to troubleshooting common issues, so your security system stays reliable.

Key Takeaways

Use the correct USB-C cable: Always use the original or a high-quality USB-C cable to avoid charging issues or damage.
Charge in a cool, dry place: Avoid extreme temperatures and humidity to protect the battery and internal components.
Check the LED indicator: The light on the card shows charging status—green means fully charged, red or blinking means charging or an error.
Don’t overcharge: While the card has built-in protection, unplugging once fully charged helps prolong battery life.
Update firmware regularly: Keep your Eufy app and card firmware up to date for optimal performance and charging efficiency.
Store properly when not in use: If storing long-term, charge to 50% and recharge every 3–6 months to maintain battery health.
Troubleshoot early: If the card won’t charge, try a different cable, power source, or reset the device before contacting support.

Introduction: Why Proper Charging Matters for Your Eufy Security Card

Your Eufy Security Card is a compact, powerful component of your home security ecosystem. Whether you’re using it with a Eufy doorbell, camera, or smart lock, this small device plays a big role in keeping your home safe. But like any rechargeable gadget, it needs regular charging to function properly.

Many users assume that charging is as simple as plugging in a cable—and while that’s mostly true, there are important steps and best practices to follow. Charging your Eufy Security Card the right way ensures longer battery life, consistent performance, and fewer technical hiccups.

In this guide, you’ll learn exactly how to charge your Eufy Security Card, from identifying your model to troubleshooting common issues. We’ll cover everything you need to know, including the tools required, step-by-step instructions, safety tips, and how to maintain your card for long-term use. By the end, you’ll feel confident keeping your security system powered and ready—no matter what.

What Is the Eufy Security Card?

Before diving into charging, let’s clarify what the Eufy Security Card actually is. The Eufy Security Card is a rechargeable battery pack designed to power various Eufy smart home devices, especially wireless doorbells and cameras. It’s small, lightweight, and built for easy removal and recharging.

Most Eufy doorbells, like the Eufy Video Doorbell Dual or the Eufy SoloCam S40, use this removable card-style battery. It slides in and out of the device, making it convenient to swap or charge without taking down the entire unit. The card typically uses a lithium-ion battery, which offers good energy density and rechargeability—but also requires careful handling.

Knowing your specific model is important because charging methods and battery capacities can vary slightly. For example, the Eufy Security Card used in the Video Doorbell 2K has a 5,200mAh battery, while newer models may have different specs. Always check your device manual or the Eufy app to confirm your card’s model and charging requirements.

Tools and Materials You’ll Need

Charging your Eufy Security Card doesn’t require fancy equipment, but having the right tools makes the process smoother and safer. Here’s what you’ll need:

Original USB-C charging cable: Eufy includes a USB-C cable with most devices. Use this whenever possible.
USB power adapter: A standard 5V/1A or 5V/2A wall adapter works best. Avoid fast chargers unless specified.
Clean, dry cloth: For wiping the card and contacts before charging.
Well-lit, stable surface: A table or desk where you can safely place the card while charging.
Access to a power outlet: Preferably one that’s not overloaded with other devices.

Optional but helpful:

A second charging cable (in case the original is lost or damaged)
A power bank (for charging on the go)
Compressed air (to clean dust from the charging port)

Avoid using damaged cables, cheap knockoff adapters, or charging in humid or hot environments. These can reduce charging efficiency or even damage the card.

Step-by-Step Guide: How to Charge Your Eufy Security Card

Now that you’re prepared, let’s walk through the charging process step by step. Follow these instructions carefully to ensure a safe and effective charge.

Step 1: Remove the Security Card from Your Device

The first step is to safely remove the Eufy Security Card from your doorbell, camera, or other compatible device. Here’s how:

Locate the release button or latch on your device. On most Eufy doorbells, this is a small button on the side or bottom.
Press and hold the button while gently pulling the card out. It should slide out smoothly.
If it feels stuck, double-check that the button is fully depressed. Never force the card—this could damage the connectors.
Once removed, inspect the card for dirt, moisture, or damage. Wipe it gently with a dry cloth if needed.

Tip: Always remove the card when the device is powered off or in a safe state. Some users prefer to do this at night when the doorbell isn’t actively recording.

Step 2: Inspect the Charging Port and Contacts

Before plugging in, take a moment to check the USB-C port on the card and the metal contacts. Look for:

Dust or debris inside the port
Corrosion or discoloration on the contacts
Physical damage like bent pins or cracks

If you see dust, use a can of compressed air to blow it out. For light corrosion, a cotton swab lightly dampened with isopropyl alcohol can help—just make sure it’s dry before charging. Never use water or abrasive materials.

Step 3: Connect the USB-C Cable

Now it’s time to plug in:

Take your USB-C cable and insert the small end into the port on the Eufy Security Card. It should fit snugly—USB-C is reversible, so orientation doesn’t matter.
Connect the other end to your USB power adapter.
Plug the adapter into a wall outlet.

Important: Make sure the connection is secure. A loose cable can cause intermittent charging or damage the port over time.

Step 4: Monitor the LED Indicator

Once connected, the LED light on the card will show its charging status. Here’s what the colors mean:

Red light: The card is charging.
Blinking red: Charging in progress, or a minor issue (like low power).
Green light: Fully charged and ready to use.
No light: Possible connection issue, dead battery, or hardware problem.

Most Eufy Security Cards take about 4–6 hours to fully charge from empty. You can check the Eufy app for real-time battery percentage if your device supports it.

Step 5: Wait for Full Charge

Leave the card connected until the LED turns solid green. Avoid unplugging too early—partial charges are fine occasionally, but regular full charges help maintain battery health.

While waiting:

Keep the card on a flat, non-conductive surface.
Avoid covering it with blankets or placing it near heat sources.
Don’t charge on beds, couches, or other soft surfaces that can trap heat.

Tip: If you’re charging overnight, set a reminder to unplug it in the morning to avoid unnecessary wear.

Step 6: Disconnect and Reinstall

Once fully charged:

Unplug the USB cable from the wall adapter first, then from the card.
Wipe the card gently with a dry cloth to remove any fingerprints or dust.
Reinsert the card into your device by aligning the connectors and sliding it in until it clicks.
Make sure it’s securely seated—loose installation can cause power issues.

Your device should power on automatically. Check the Eufy app to confirm the battery level and that the system is online.

Best Practices for Charging Your Eufy Security Card

To get the most out of your Eufy Security Card, follow these best practices:

Charge Regularly, But Not Constantly

Lithium-ion batteries, like the one in your Eufy card, prefer partial discharges over deep ones. Try to charge when the battery drops to 20–30%, rather than waiting until it’s completely dead. This reduces stress on the battery and extends its lifespan.

Avoid keeping the card plugged in 24/7. While modern devices have overcharge protection, continuous charging can generate heat and degrade the battery over time.

Use the Right Power Source

Not all USB adapters are created equal. Use a reliable 5V/1A or 5V/2A adapter—avoid fast chargers (like 9V or 12V) unless your model specifically supports them. High-voltage chargers can overheat the card or damage the battery.

If you’re using a computer USB port, make sure it’s powered on and not in sleep mode. Some laptops reduce USB power when idle, which can slow charging.

Store Properly When Not in Use

If you’re not using your Eufy device for a while (e.g., during travel or seasonal storage), follow these storage tips:

Charge the card to about 50% before storing.
Store in a cool, dry place away from direct sunlight.
Avoid temperatures below 0°C (32°F) or above 45°C (113°F).
Recharge every 3–6 months to prevent deep discharge.

Storing at full charge can degrade the battery faster, while storing at 0% can cause permanent damage.

Keep Firmware Updated

Eufy regularly releases firmware updates that improve battery management and charging efficiency. To update:

Open the Eufy Security app.
Go to Device Settings > Firmware Update.
Follow the on-screen instructions.

Updated firmware can fix bugs, improve charging speed, and extend battery life.

Troubleshooting Common Charging Issues

Even with proper care, you might run into charging problems. Here’s how to fix the most common ones.

The Card Won’t Charge

If the LED doesn’t light up or the card doesn’t charge:

Check the cable: Try a different USB-C cable to rule out a faulty connection.
Test the power source: Plug the cable into a different outlet or use a power bank.
Inspect the port: Look for debris or damage. Clean gently if needed.
Restart the card: Unplug for 10 seconds, then reconnect.

If none of these work, the battery may be deeply discharged. Leave it plugged in for 1–2 hours to see if it “wakes up.”

LED Blinks Red or Flashes

A blinking red light can mean:

The battery is very low and needs time to charge.
There’s a connection issue with the cable or port.
The card is overheating—move it to a cooler location.

Wait 10–15 minutes. If the blinking continues, try a different cable or power source.

Charging Is Very Slow

Slow charging can be caused by:

A low-power USB port (like on a laptop in sleep mode).
A damaged or low-quality cable.
High ambient temperature.

Switch to a wall adapter and ensure the environment is cool and dry.

Card Gets Hot While Charging

Some warmth is normal, but excessive heat is a concern. If the card feels hot to the touch:

Unplug it immediately.
Let it cool in a well-ventilated area.
Check for blockages around the card.
Avoid charging in direct sunlight or near heaters.

If overheating happens repeatedly, contact Eufy support—it could indicate a battery defect.

Card Won’t Hold a Charge

If the card charges but drains quickly:

It may be nearing the end of its lifespan (typically 2–3 years).
The device it’s powering might have a high power draw (e.g., frequent recordings).
Firmware may need updating.

Consider replacing the card if it’s old or under warranty.

Safety Tips for Charging Your Eufy Security Card

Safety should always come first when handling rechargeable batteries. Follow these guidelines:

Never charge near water: Avoid bathrooms, kitchens, or outdoor areas with moisture.
Don’t puncture or disassemble the card: Lithium-ion batteries can be dangerous if damaged.
Keep away from children and pets: Small parts and cables can be choking hazards.
Use only Eufy-approved accessories: Third-party cables or adapters may not meet safety standards.
Dispose of old cards properly: Take them to an e-waste recycling center—don’t throw in regular trash.

If you notice swelling, leaking, or a burning smell, stop using the card immediately and contact Eufy support.

How Long Does the Eufy Security Card Last?

Battery life depends on usage, but most Eufy Security Cards last:

3–6 months per charge under normal use (e.g., 10–20 motion events per week).
1–2 months with heavy use (constant recording, frequent alerts).

Factors that affect battery life:

Temperature: Cold weather reduces battery efficiency.
Recording quality: Higher resolution uses more power.
Wi-Fi signal strength: Weak signals cause the device to work harder.
Frequency of use: More motion events = faster drain.

To maximize battery life, adjust settings in the Eufy app—like reducing video quality or enabling motion zones.

When to Replace Your Eufy Security Card

Even with perfect care, batteries don’t last forever. Consider replacing your card if:

It no longer holds a charge for more than a few days.
The device frequently powers off unexpectedly.
The card shows physical damage (swelling, cracks, leaks).
It’s more than 2–3 years old.

Eufy offers replacement cards for most models. Check their official website or contact customer support for compatibility.

Conclusion: Keep Your Security System Powered and Reliable

Charging your Eufy Security Card is a simple but essential task for maintaining a reliable home security system. By following the steps in this guide—using the right cable, monitoring the LED, charging in a safe environment, and troubleshooting issues early—you’ll keep your card in top condition for years.

Remember, proper charging isn’t just about convenience—it’s about safety, performance, and peace of mind. A well-maintained Eufy Security Card ensures your doorbell, camera, or smart lock is always ready when you need it.

Take a few minutes each month to check your card’s charge level and follow best practices. Your future self—and your home’s security—will thank you.