What Kind of Batteries Does My Aqara Doorbell Take Revealed

Your Aqara Doorbell runs on two CR2032 coin cell batteries, ensuring long-lasting, reliable performance with easy replacements. These widely available 3V lithium batteries are simple to install and typically last 6–12 months, depending on usage and environmental factors.

Key Takeaways

• Use CR2032 batteries: Aqara doorbells require this coin-cell type for reliable performance.
• Check battery compartment: Confirm model-specific needs before replacing batteries.
• Replace promptly: Low batteries trigger alerts—swap them immediately to avoid downtime.
• Buy quality brands: Opt for reputable CR2032 brands to extend lifespan and safety.
• Store spares properly: Keep extras in a cool, dry place for quick swaps.
• Recycle old batteries: Dispose of used CR2032 cells at designated recycling centers.

Understanding Your Aqara Doorbell’s Power Needs

When you invest in a smart home device like the Aqara Doorbell, one of the most common—and often overlooked—questions is: “What kind of batteries does my Aqara doorbell take?” While features like motion detection, two-way audio, and seamless integration with Apple HomeKit or Google Home get the spotlight, the power source is the unsung hero that keeps your doorbell running day in and day out. Without the right battery, even the most advanced smart doorbell can become a paperweight. Whether you’re a first-time smart home user or a seasoned tech enthusiast, understanding the battery requirements of your Aqara doorbell is crucial for ensuring uninterrupted performance and long-term reliability.

The Aqara Doorbell lineup—including models like the Aqara Video Doorbell G2H (HomeKit), G2H Pro, and the newer Aqara Smart Video Doorbell G4—each have unique power specifications. While some models are designed for wired installation with optional battery backup, others are entirely battery-powered, making battery selection and maintenance a top priority. In this comprehensive guide, we’ll dive deep into the battery types, specifications, performance expectations, and best practices to keep your Aqara doorbell functioning optimally. From identifying the correct battery model to maximizing battery life and avoiding common pitfalls, we’ve got you covered with practical, real-world advice backed by technical insights.

Which Aqara Doorbell Models Are Battery-Powered?

Not all Aqara doorbells are created equal when it comes to power. Before you rush to buy batteries, it’s essential to determine whether your specific model is battery-powered, wired, or hybrid (supporting both). Let’s break down the most popular Aqara doorbell models and their power configurations.

Battery-Powered Aqara Doorbells

The Aqara Smart Video Doorbell G4 is a fully wireless, battery-powered model designed for easy installation without the need for existing doorbell wiring. It’s ideal for renters, homeowners with no pre-existing wiring, or those who prefer a clean, wire-free setup. This model runs entirely on four 18650 lithium-ion rechargeable batteries, which are not included in the box. The G4 is engineered for low power consumption, using advanced sleep modes and motion-activated recording to extend battery life.

Another battery-centric model is the Aqara Video Doorbell G2H (Pro), which offers both wired and battery-powered options. However, in battery-only mode (without connecting to existing doorbell wires), it relies on two CR123A lithium primary batteries. This dual-mode flexibility makes the G2H Pro popular among users who want the option to switch between power sources depending on their home setup.

Wired and Hybrid Models

The Aqara Video Doorbell G2H (HomeKit Secure Video) is primarily a wired device, designed to connect to your existing 8–24V AC doorbell transformer. However, it includes an internal rechargeable battery as a backup during power outages. This battery is not user-replaceable and is charged via the wired connection. While it doesn’t require you to swap out batteries regularly, it’s still important to understand the internal power system to troubleshoot issues like low battery alerts or charging failures.

Similarly, the Aqara G2H Pro can be wired for continuous power but defaults to battery use if no wiring is available. This hybrid capability means you can enjoy the best of both worlds: stable, uninterrupted power when wired, and portability and ease of install when using batteries.

Key Takeaway: Know Your Model

To answer the question “What kind of batteries does my Aqara doorbell take?” you must first identify your model. Here’s a quick reference:

• G4 (Wireless): 4x 18650 rechargeable lithium-ion batteries
• G2H (Wired): Internal non-replaceable battery (charged via wiring)
• G2H Pro (Hybrid): 2x CR123A lithium primary batteries (when used wirelessly)

Always check the model number on the back of your device or in the Aqara app under device settings to confirm your doorbell’s power requirements.

Battery Specifications: What You Need to Know

Now that you know which models use batteries, let’s explore the technical details of the batteries themselves. Using the wrong type, brand, or quality can drastically affect performance, safety, and longevity.

CR123A Batteries: For the Aqara G2H Pro

The CR123A (also known as CR17345) is a 3V lithium primary battery commonly used in high-drain devices like security cameras and doorbells. It’s a cylindrical battery measuring 34.5mm in length and 17mm in diameter. Key features include:

• Voltage: 3.0V nominal (can range from 2.0V to 3.2V during discharge)
• Capacity: Typically 1500–1700 mAh (milliamp-hours)
• Chemistry: Lithium manganese dioxide (Li-MnO₂)—non-rechargeable
• Shelf life: Up to 10 years when stored properly

Why CR123A? The G2H Pro uses these batteries because they deliver consistent power under high-drain conditions, such as when the camera activates, the LED turns on, or two-way audio is used. They also perform well in temperature extremes (-30°C to 60°C), making them ideal for outdoor use.

Important Tip: Never use rechargeable “RCR123A” batteries unless explicitly approved by Aqara. While RCR123A batteries exist (3.6–3.7V Li-ion), they can damage the device due to overvoltage. Stick to non-rechargeable CR123A batteries from reputable brands like Panasonic, Duracell, Energizer, or Sanyo.

18650 Batteries: For the Aqara G4

The 18650 is a rechargeable lithium-ion battery measuring 65mm in length and 18mm in diameter. The Aqara G4 requires four 18650 cells (typically 3.7V each, connected in series/parallel for ~7.4V total). Specifications include:

• Voltage: 3.6–3.7V nominal (4.2V when fully charged)
• Capacity: 2600–3500 mAh (higher capacity = longer runtime)
• Chemistry: Lithium-ion (Li-ion), usually IMR or INR for safety
• Rechargeable: Yes, via USB-C (G4 has built-in charging)

Why 18650? These batteries offer high energy density, long cycle life (500+ charge cycles), and are widely used in electronics like laptops and power tools. The G4’s design includes a charging circuit that safely manages voltage and prevents overcharging.

Pro Tip: Use protected 18650 batteries (with built-in protection circuits against overcharge, over-discharge, and short circuits). Brands like Samsung 30Q, Sony VTC6, or Molicel P28A are excellent choices. Avoid cheap, unbranded 18650s—they may pose safety risks.

Voltage and Compatibility

Never mix battery types or brands. Using mismatched batteries (e.g., one 3000 mAh and one 2600 mAh 18650) can cause uneven discharge, reduced performance, or damage. Always use matched pairs or sets. For CR123A, ensure both batteries are the same brand and age.

Also, avoid alkaline or NiMH batteries—they don’t provide the voltage or discharge rate required by Aqara doorbells and may trigger “low battery” warnings prematurely.

How Long Do Aqara Doorbell Batteries Last?

Battery life varies significantly based on usage patterns, environmental conditions, and battery quality. Let’s explore real-world performance expectations for both battery types.

G2H Pro with CR123A Batteries

Under typical conditions (10–20 motion events per day, 30-second video clips, occasional two-way talk), a pair of high-quality CR123A batteries (e.g., Panasonic CR123A) should last 6 to 8 months. However, several factors can shorten this:

• High activity: If your doorbell detects motion 50+ times daily, battery life may drop to 4 months.
• Extreme temperatures: Cold weather (<0°C) reduces lithium battery efficiency by up to 30%.
• Low-quality batteries: Off-brand CR123As may only last 3–4 months.

Real-World Example: A homeowner in Chicago reported 5.5 months of use with Energizer CR123A batteries, averaging 15 motion events per day. In contrast, a user in Florida with frequent porch traffic (30+ events/day) saw battery life drop to 3.8 months.

G4 with 18650 Batteries

The G4’s battery life is highly dependent on usage. With four 3000 mAh 18650 batteries, you can expect:

• Low usage (5 events/day): 6–8 months
• Moderate usage (10–15 events/day): 4–5 months
• High usage (20+ events/day): 2.5–3.5 months

The G4 includes power-saving features like “Event-Only” mode (records only when motion is detected) and adjustable video quality (720p vs. 1080p). Lower resolution and shorter clip lengths extend battery life. Enabling “Night Vision IR” also increases drain—especially if motion occurs frequently after dark.

Pro Tip: Use the Aqara app to monitor battery percentage. When it drops to 20%, recharge promptly. Deep discharges can shorten 18650 battery lifespan.

Factors That Affect Battery Life

• Wi-Fi signal strength: Weak signal causes the doorbell to work harder to maintain connection, increasing power use.
• Chime usage: If you use the Aqara chime frequently, it draws power from the doorbell.
• Firmware updates: New updates may optimize power usage—always keep your device updated.
• Battery age: Lithium batteries degrade over time, even when not in use. Replace CR123As every 1–2 years, even if unused.

How to Replace and Maintain Aqara Doorbell Batteries

Proper battery replacement and maintenance ensure your doorbell stays online and avoids unexpected downtime.

Replacing CR123A Batteries (G2H Pro)

1. Remove the doorbell: Use the included removal tool or a flathead screwdriver to gently pry the doorbell off the mounting bracket.
2. Open the battery compartment: Locate the small screw on the back and remove it. Slide or lift the battery cover.
3. Insert new batteries: Place two fresh CR123A batteries, ensuring correct polarity (+/-).
4. Reattach the cover and doorbell: Screw the cover back on and re-mount the doorbell.
5. Check the app: Open the Aqara app to verify the device reconnects and shows full battery.

Safety Note: Do not force batteries. If they don’t fit easily, double-check orientation. Dispose of old batteries at a certified e-waste or battery recycling center.

Charging 18650 Batteries (G4)

The G4 has a built-in USB-C charging port. To recharge:

1. Remove the doorbell from the mount.
2. Locate the USB-C port (usually on the bottom or side).
3. Connect a USB-C cable to a 5V/2A power adapter or a USB port on your computer.
4. The LED indicator will glow red (charging) and turn green (fully charged).
5. Charging time: ~6–8 hours for four 3000 mAh batteries.

Tip: You can charge the G4 while it’s mounted using a long USB-C cable, but ensure the cable doesn’t obstruct the motion sensor.

Best Practices for Battery Maintenance

• Use a battery organizer: Store spare CR123A or 18650 batteries in a cool, dry place away from metal objects.
• Label batteries: Mark purchase dates on batteries to track lifespan.
• Clean contacts: Use a cotton swab and isopropyl alcohol to clean battery contacts if you notice connection issues.
• Charge 18650s at 20–80%: Avoid full discharges and overcharging to prolong battery health.

Cost Comparison and Where to Buy

Let’s break down the cost of batteries and where to find reliable, high-performance options.

CR123A Battery Cost

A pair of Panasonic CR123A batteries costs around $8–$10 (e.g., $4.50 per battery). Bulk packs (12-pack) can reduce the price to ~$3.50 per battery. Avoid ultra-cheap batteries (<$2)—they often have poor capacity and leakage risks.

Where to Buy:

• Amazon (Prime-eligible)
• B&H Photo Video
• Local electronics stores (Best Buy, Micro Center)
• Specialty battery retailers (Battery Junction, All-Battery)

18650 Battery and Charging Cost

Four 3000 mAh protected 18650 batteries (e.g., Molicel P28A) cost $40–$60 ($10–$15 per battery). The G4 includes a USB-C cable, but you may want a second cable for convenience (~$5–$10).

Where to Buy:

• Authorized Aqara retailers (Amazon, Aqara.com)
• Battery specialty stores (Liion Wholesale, Battery Junction)
• Electronics distributors (Digi-Key, Mouser)

Cost Per Year: For the G2H Pro, annual battery cost is ~$20 (2 pairs). For the G4, it’s ~$50 (one full set, assuming 500 cycles and 3-year lifespan).

Model	Battery Type	Quantity	Estimated Lifespan	Annual Cost (USD)	Charging Required?
Aqara G2H Pro	CR123A (Non-rechargeable)	2	6–8 months	$20	No
Aqara G4	18650 (Rechargeable)	4	3–8 months (usage-dependent)	$50 (one set, lasts ~3 years)	Yes (USB-C)
Aqara G2H (Wired)	Internal (Non-replaceable)	1 (built-in)	5+ years	$0 (charged via wiring)	No

Final Thoughts: Powering Your Aqara Doorbell for Long-Term Success

Answering the question “What kind of batteries does my Aqara doorbell take?” is just the beginning. The real value lies in understanding how to choose, install, and maintain those batteries to ensure your smart doorbell delivers reliable performance for years. Whether you’re using the G4 with its high-capacity 18650 cells or the G2H Pro with its dependable CR123A batteries, the key is consistency, quality, and smart usage habits.

Invest in reputable battery brands, monitor your doorbell’s activity patterns, and take advantage of power-saving features in the Aqara app. Remember that environmental factors, Wi-Fi stability, and firmware updates all play a role in battery longevity. By following the guidelines in this guide, you’ll avoid the frustration of sudden power loss and ensure your Aqara doorbell remains a vigilant guardian of your home.

Ultimately, the right battery isn’t just about specs—it’s about peace of mind. With the correct power source, your Aqara doorbell will continue to capture every visitor, alert you to deliveries, and integrate seamlessly into your smart home ecosystem. So take the time to check your model, stock up on the right batteries, and set a calendar reminder for replacements or recharges. Your front door—and your home security—will thank you.

Frequently Asked Questions

What kind of batteries does my Aqara doorbell take?

Most Aqara doorbells, like the Aqara Video Doorbell G2H, use two CR123A (3V) lithium batteries. These batteries offer long-lasting power and reliable performance in extreme temperatures.

Can I use rechargeable batteries in my Aqara doorbell?

While CR123A batteries are typically disposable, you can use rechargeable lithium CR123A batteries (3.7V). Avoid standard NiMH rechargeables, as they may not provide the voltage needed for optimal doorbell function.

How long do the batteries last in an Aqara doorbell?

Battery life varies by model and usage, but most Aqara doorbells last 3–6 months on two CR123A batteries. High-traffic areas or frequent live streaming can reduce battery life significantly.

Where can I buy batteries for my Aqara doorbell near me?

CR123A batteries for your Aqara doorbell are available at electronics stores (e.g., Best Buy), pharmacies, or online retailers like Amazon. Look for reputable brands like Energizer or Panasonic for best results.

What happens if I install the wrong batteries in my Aqara doorbell?

Using incorrect batteries (e.g., wrong voltage or size) can damage the device or cause malfunctions. Always follow the manufacturer’s recommendation for CR123A 3V lithium batteries to ensure safety and performance.

Does the Aqara doorbell have a low-battery warning?

Yes, most Aqara doorbells send a low-battery alert via the Aqara Home app. You’ll receive a notification when batteries need replacing, ensuring you never miss a visitor due to power loss.