Aqara G4门铃探测距离实测：电池 vs 外接电源
背景
Background
Aqara官方对G4门铃的PIR探测距离描述为：横向移动时，高灵敏度可探测约4米。但官方未明确提及不同供电模式下这项性能是否有差异。
根据官方规格，当门铃使用电池供电时，PIR传感器的工作状态会受到省电策略的影响。我决定通过实测来验证。
Aqara officially states that the G4 doorbell’s PIR detection range is approximately 4 meters (horizontal movement, high sensitivity). However, the specifications do not clarify whether this performance varies under different power supply modes.
According to the official specs, when the doorbell runs on batteries, the PIR sensor‘s behavior is influenced by power-saving strategies. I decided to test this myself.
测试环境
Test Environment
- 门铃安装在防盗门上，正对楼梯
- 楼梯从下一层上来到门口，共九级台阶
- 电池模式：使用6节全新碱性电池
- 外接电源模式：使用12V直流电源适配器
The doorbell is mounted on my security door, directly facing a staircase. There are nine steps from the lower floor up to my door.
- Battery mode: 6 fresh alkaline batteries
- Wired mode: 12V DC power adapter
实测结果
Test Results
| 供电模式 | 实测探测距离 | 触发时机 |
|---|---|---|
| 电池供电 | 约2米 | 人走完九级台阶、到达门口约2米内才触发；爬楼较快时只能拍到背影 |
| 外接电源 | 约4米 | 人刚踏上楼梯（距离门约4米）即触发；楼上有人下来时，在上一层的台阶顶部即可拍到 |
| Power Mode | Actual Detection Range | Trigger Timing |
|---|---|---|
| Battery | ~2 meters | Triggers only after the person finishes the nine steps, within about 2 meters of the door. If walking fast, only the back is captured. |
| Wired | ~4 meters | Triggers as soon as a person steps onto the stairs (~4 meters away). When someone comes downstairs, they are captured at the top of the stairs. |
结论
Conclusion
G4门铃的PIR探测距离在不同供电模式下存在显著差异：
- 电池模式下，实际有效探测距离约为官方标称值的一半（约2米）
- 外接电源模式下，探测距离达到官方标称的4米
官方规格中并未说明这一差异。如果用户仅使用电池供电并对探测距离不满，可能会误认为产品性能不佳，而实际上只要接上外接电源即可获得完整性能。
有用户反馈，在电池供电时，门铃的视频连接可能耗时10秒以上；而在有线供电时，延迟可降至远低于1秒。这表明供电模式不仅影响探测距离，还影响整体响应速度。
The PIR detection range of the G4 doorbell varies significantly between power modes:
- In battery mode, the actual effective range is roughly half of the official specification (~2 meters).
- In wired mode, the detection range reaches the advertised 4 meters.
This difference is not mentioned in the official specifications. Users who rely solely on battery power and are dissatisfied with the detection range might assume the product is defective, when in fact full performance is achieved simply by connecting wired power.
Some users have reported that video connection can take over 10 seconds on battery power, while on wired power the delay can drop to well under 1 second. This suggests that power mode affects not only detection range but overall responsiveness as well.
建议
Recommendation
如果你对G4门铃的探测距离或响应速度不满意，建议优先尝试外接电源供电 。这可能是解锁设备完整性能的最直接方法。
If you are unsatisfied with the G4‘s detection range or response speed, try using wired power first . This may be the most direct way to unlock the device’s full performance.
附注
Note
本文基于实测数据，测试环境为普通住宅楼道。实际效果可能因安装位置、楼道结构、环境温度等因素略有差异。
This article is based on real-world testing in a standard residential stairwell. Actual results may vary depending on installation position, stairwell layout, ambient temperature, and other factors.