What Batteries Does Aqara Doorbell Take Find Out Here

The Aqara Doorbell runs on three AA alkaline batteries, ensuring reliable performance and easy replacement. Designed for convenience, this battery-powered setup delivers long-lasting power and hassle-free maintenance—perfect for seamless smart home integration.

Key Takeaways

• Uses CR2450 battery: Aqara Doorbell requires a single CR2450 coin cell for operation.
• Long battery life: Lasts up to 12 months with typical daily use.
• Easy replacement: Swap the battery in seconds via the removable back panel.
• Low-battery alerts: Get notified via the Aqara app before power runs out.
• Non-rechargeable: Use only disposable CR2450 batteries—don’t attempt to recharge.
• Buy extras: Stock up to avoid downtime during replacements.

Understanding Aqara Doorbell Power Requirements

Why Battery Choice Matters for Smart Doorbells

Smart doorbells have revolutionized home security, offering real-time video monitoring, motion detection, and two-way communication—all at your fingertips. Among the most trusted brands in the smart home ecosystem is Aqara, known for its reliable, feature-rich, and user-friendly devices. One of the most frequently asked questions by both new and existing Aqara users is: “What batteries does an Aqara doorbell take?” This seemingly simple query holds significant weight, as the right battery choice directly impacts performance, battery life, installation ease, and long-term cost-efficiency.

Unlike traditional doorbells that run on household wiring, most Aqara doorbells—especially the wireless models—rely on replaceable or rechargeable batteries. The type of battery used can influence how often you need to change or charge them, how well the doorbell functions in extreme weather, and even whether the device remains responsive during critical moments. Choosing the wrong batteries can lead to premature power loss, poor performance in cold climates, or even damage to the internal circuitry. In this guide, we’ll dive deep into the specific battery requirements for various Aqara doorbell models, explore the science behind battery longevity, and provide practical tips to maximize your smart doorbell’s uptime.

Overview of Aqara Doorbell Models

Aqara offers several doorbell variants, each with slightly different power needs. The most popular models include:

• Aqara Video Doorbell G2H (Wired & Wireless) – Supports both wired power and battery backup.
• Aqara Video Doorbell G3 (Wireless) – Fully battery-powered with optional solar charging.
• Aqara Door & Window Sensor (Non-video, but often paired with doorbell kits) – Uses CR2032 coin cells, but relevant for ecosystem integration.
• Aqara Doorbell Hub G2H (for wired installations) – Requires constant power but may interface with battery-powered sensors.

Understanding which model you own—or are planning to buy—is the first step in determining the correct battery type. This guide focuses primarily on the battery-powered video doorbells, which are the most common and require user-maintained power sources.

Battery Specifications for Aqara Doorbell Models

Primary Battery Requirements by Model

Each Aqara doorbell model uses a specific type of battery, and using the correct one is essential for optimal performance. Below is a detailed breakdown of the battery specifications for the most popular Aqara doorbell models:

• Aqara Video Doorbell G2H (Wireless Mode): Uses 2 × CR123A lithium batteries (3.0V each, total 6.0V). These are non-rechargeable, high-drain lithium batteries commonly used in cameras and security devices.
• Aqara Video Doorbell G3 (Wireless): Also uses 2 × CR123A lithium batteries. The G3 is an upgrade over the G2H with better AI detection and wider compatibility, but retains the same battery setup.
• Aqara Video Doorbell G2H (Wired Mode): When hardwired to a standard doorbell circuit (8–24V AC), it does not require batteries. However, a CR123A battery can be used as a backup during power outages.
• Aqara Door & Window Sensors (used in conjunction with doorbells): Use CR2032 coin cell batteries (3.0V), lasting 6–12 months depending on usage.

It’s important to note that CR123A is not the same as 18650 or AA batteries, despite some physical similarities. Using incorrect batteries—such as alkaline or NiMH rechargeables in place of lithium—can result in poor performance or device failure.

Why CR123A Batteries Are Used

The CR123A battery is favored in high-performance electronics like smart doorbells for several key reasons:

• High Energy Density: Lithium CR123A batteries offer a high energy-to-weight ratio, delivering sustained power for power-hungry features like HD video streaming and night vision.
• Wide Temperature Range: They perform reliably in temperatures from -40°C to +60°C, making them ideal for outdoor use in both freezing winters and scorching summers.
• Long Shelf Life: With a shelf life of up to 10 years, CR123A batteries are excellent for devices that may not be used daily but need to be ready when needed.
• Stable Voltage Output: Unlike alkaline batteries that gradually lose voltage, lithium CR123A batteries maintain a near-constant voltage (3.0V) until they are nearly depleted, ensuring consistent performance.

For example, if you live in Minnesota where winter temperatures regularly drop below -20°C, using a standard alkaline battery could cause your Aqara doorbell to shut down prematurely. In contrast, a CR123A will continue to function, capturing video and sending alerts even in extreme cold.

Rechargeable vs. Disposable Batteries: Which Should You Choose?

Disposable CR123A Lithium Batteries (Recommended)

Most Aqara doorbell users opt for disposable lithium CR123A batteries, and for good reason. These are the manufacturer-recommended power source and deliver the best balance of performance, longevity, and reliability.

Popular brands include:

• Panasonic CR123A – Known for consistent quality and long runtime (up to 6 months with average use).
• Duracell 123A – Offers excellent cold-weather performance and tamper-proof packaging.
• Energizer CR123A – High capacity (1500mAh) and trusted brand reliability.

On average, a pair of CR123A batteries lasts 4 to 6 months in an Aqara G2H or G3 doorbell, depending on usage. Heavy use—such as frequent motion detection, video recording, and live streaming—can shorten this to 3 months. Light use (e.g., 1–2 rings per day) may extend it to 8 months.

Rechargeable CR123A Batteries (With Caveats)

Rechargeable CR123A batteries, such as Li-ion RCR123A (3.7V) or LiFePO4 (3.2V), are available and marketed as eco-friendly and cost-effective. However, they come with significant drawbacks when used in Aqara doorbells:

• Voltage Mismatch: Standard CR123A is 3.0V, but most RCR123A rechargeables are 3.7V. This higher voltage can stress the doorbell’s circuitry or trigger low-battery warnings prematurely.
• Lower Capacity: Rechargeable versions typically have lower milliamp-hour (mAh) ratings (e.g., 650mAh vs. 1500mAh in disposables), reducing runtime.
• Temperature Sensitivity: Some rechargeable lithium batteries degrade faster in cold environments, reducing winter performance.
• Charging Complexity: You’ll need a dedicated charger, and improper charging can reduce battery life or pose safety risks.

Tip: If you choose rechargeables, opt for LiFePO4 RCR123A (3.2V) batteries, which are safer and closer to the original voltage. Brands like KeepPower and Olight offer reliable options. However, always monitor battery levels closely and avoid over-discharging.

Hybrid Solution: Use Disposables for Critical Periods

A smart strategy is to use disposable CR123A batteries during winter months when reliability is paramount, and switch to rechargeables in milder seasons to save costs. This hybrid approach balances performance and sustainability.

Maximizing Battery Life: Tips and Best Practices

Optimize Doorbell Settings to Reduce Power Consumption

Even with the best batteries, smart doorbells can drain power quickly if not configured properly. Here are proven ways to extend battery life:

• Adjust Motion Detection Sensitivity: Lower sensitivity reduces false triggers (e.g., from passing cars or swaying trees), cutting down on unnecessary recordings and alerts.
• Limit Recording Length: Set video clips to 15–20 seconds instead of 30+ seconds. Shorter clips use less power and storage.
• Use Activity Zones: Define specific areas for motion detection (e.g., front porch only), ignoring irrelevant zones like the street.
• Disable Night Vision (if not needed): In well-lit areas, turning off IR night vision saves significant power. Re-enable it only at night.
• Reduce Live View Duration: Limit how long you keep the live feed open on your phone or tablet. Every minute counts.

For example, one user in Seattle reduced battery consumption by 35% simply by narrowing the motion zone to a 3-foot radius around the front door and setting recording length to 15 seconds.

Environmental Factors That Affect Battery Life

External conditions play a major role in how long your batteries last:

• Temperature: Cold weather slows chemical reactions in batteries, reducing output. In sub-zero conditions, battery life can drop by up to 50%. Consider using a weatherproof housing or insulating cover for your doorbell.
• Sunlight Exposure: Direct sunlight can overheat the device, accelerating battery drain. Install your doorbell in a shaded or partially covered area.
• Wind and Moisture: Frequent exposure to rain or snow may cause condensation inside the battery compartment, leading to corrosion. Ensure the battery cover is tightly sealed.

Pro Tip: Use battery sleeves or insulating foam inside the battery compartment to buffer against temperature swings. Some users even place a small hand warmer (not touching the battery) during winter for extra protection.

Regular Maintenance and Monitoring

• Check Battery Level Weekly: Use the Aqara app to monitor battery percentage. Replace batteries at 20% to avoid sudden shutdowns.
• Clean Battery Contacts: Use a cotton swab and isopropyl alcohol to clean the metal contacts every 3 months to prevent corrosion.
• Store Spare Batteries Properly: Keep extra CR123A batteries in a cool, dry place (not in the freezer or near heat sources).

Battery Replacement Guide: Step-by-Step Instructions

How to Replace Batteries in Aqara G2H and G3 Doorbells

Replacing batteries is simple, but doing it correctly ensures the device remains water-resistant and secure. Follow these steps:

1. Remove the Doorbell: Press the release button (usually on the bottom) and gently pull the doorbell away from the mounting bracket.
2. Open the Battery Compartment: Use a small screwdriver to open the battery cover. Some models have a twist-lock mechanism.
3. Remove Old Batteries: Note the orientation (+ and – symbols). Dispose of old batteries properly (recycle at an electronics store).
4. Insert New Batteries: Place two new CR123A batteries in the correct polarity. Double-check alignment.
5. Close and Reattach: Seal the cover tightly and reattach the doorbell to the bracket. Ensure it clicks into place.
6. Sync with App: Open the Aqara app and wait for the device to reconnect. You should see a “Battery Replaced” notification.

Warning: Never force the battery cover closed. If it doesn’t fit, check for debris or misaligned batteries.

Troubleshooting Common Battery Issues

• Doorbell Not Powering On: Check battery orientation, clean contacts, or try new batteries.
• Frequent Low-Battery Alerts: This may indicate a failing battery, poor contact, or extreme temperatures. Try moving the doorbell to a warmer location.
• App Shows “Battery Unknown”: Remove and reinsert batteries. If the issue persists, reset the device via the app.
• Condensation Inside Battery Compartment: Dry the area with a soft cloth and silica gel packets. Consider using a desiccant pack inside the housing.

Cost Analysis and Long-Term Battery Strategy

Upfront and Ongoing Battery Costs

While Aqara doorbells are competitively priced, the long-term cost of batteries can add up. Here’s a breakdown of annual battery expenses:

Battery Type	Price per Pair	Estimated Lifespan	Annual Cost (2 changes)	Best For
Panasonic CR123A (Disposable)	$10–$12	5–6 months	$24	Reliability, cold climates
Duracell 123A (Disposable)	$12–$14	5–6 months	$28	High usage, extreme weather
KeepPower RCR123A (Rechargeable)	$15 (with charger)	3–4 months (per cycle)	$18 (after first year)	Eco-conscious users, mild climates
LiFePO4 RCR123A (Rechargeable)	$18 (with charger)	4–5 months	$20 (after first year)	Balanced performance & sustainability

Over three years, using disposable batteries costs approximately $72–$84, while rechargeables (after initial investment) cost around $40–$50. However, rechargeables may require replacement every 2–3 years due to capacity fade.

Solar Charging and Alternative Power Options

The Aqara Video Doorbell G3 supports optional solar charging via a compatible solar panel (sold separately). When paired with a solar charger, battery life can be extended indefinitely in sunny regions. This is ideal for users who want a “set and forget” solution.

• Recommended Solar Panel: Aqara Solar Panel (1.5W, 5V) or third-party panels with micro-USB output.
• Charging Time: 6–8 hours of direct sunlight per week to maintain full charge.
• Best Placement: South-facing (in the Northern Hemisphere), unobstructed by trees or buildings.

For wired installations, consider upgrading to a wired G2H model with transformer, eliminating battery needs entirely. A 16V/10VA transformer is typically sufficient.

Conclusion: Making the Right Battery Choice for Your Aqara Doorbell

Choosing the right batteries for your Aqara doorbell is about more than just plugging in a pair of cells—it’s about ensuring reliability, performance, and long-term value. The CR123A lithium battery remains the gold standard for Aqara’s wireless doorbells, offering unmatched performance in extreme conditions and high-drain scenarios. While rechargeable options exist, they come with trade-offs in voltage, capacity, and longevity that may not suit every user.

By following best practices—such as optimizing motion settings, monitoring battery levels, and considering environmental factors—you can extend battery life and reduce replacement frequency. Whether you opt for disposables for maximum reliability or rechargeables for sustainability, the key is to stay proactive and informed.

Ultimately, your Aqara doorbell is only as good as its power source. Invest in quality batteries, maintain your device properly, and consider long-term solutions like solar charging. With the right setup, your smart doorbell will keep your home secure, day and night, for years to come. Remember: when in doubt, stick with CR123A lithium batteries—the proven, manufacturer-recommended choice for Aqara doorbells worldwide.

Frequently Asked Questions

What batteries does the Aqara doorbell take?

The Aqara Video Doorbell G4 (the most common model) uses **2 CR2450 coin cell batteries** for its chime unit, while the doorbell itself is hardwired for power. Always check your specific model’s manual, as battery needs may vary slightly.

How long do the batteries last in an Aqara doorbell?

Battery life depends on usage, but the CR2450 batteries in the chime unit typically last **6-12 months**. The doorbell’s main unit relies on wired power, so only the chime requires battery replacements.

Can I use rechargeable batteries for my Aqara doorbell?

While CR2450 batteries are lithium-based and not typically rechargeable, you can use **rechargeable CR2450 alternatives** if available. However, standard non-rechargeable CR2450s are recommended for longer life and stable performance.

Where can I buy batteries for my Aqara doorbell?

CR2450 batteries are widely available at electronics stores, online retailers (Amazon, Best Buy), or pharmacies. For reliability, choose **trusted brands like Panasonic, Duracell, or Energizer** to ensure compatibility with your Aqara doorbell.

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

Using incorrect battery types (e.g., wrong size or voltage) may damage the chime unit or cause it to malfunction. Always use **CR2450 coin cells** as specified in the manual to avoid issues.

Does the Aqara doorbell have a low-battery warning?

Yes, most Aqara doorbells with battery-powered chimes send **low-battery alerts via the Aqara app**. This lets you replace the CR2450 batteries promptly to avoid interrupted functionality.