Please note that the battery life of your eufyCam E40 depends on various factors, such as the camera settings, usage mode, usage scenario, environmental temperatures, etc.

Here are several useful tips to enhance the battery life of your eufyCam E40:

1. Choose “Optimal Battery Life” in the Power Manager settings.

2. If you need the camera to only detect movement related to people, choose “Human Only” in the Motion Detection settings.

3. Reduce the sensitivity level for motion detection in the Motion Detection settings.

4. Use the Activity Zone feature in the app to set up zones that focus on monitoring your areas of interest rather than the entire camera’s field of view.

5. Mount the camera in a location where its integrated solar panel receives adequate sunlight.

6. Turn off the Snapshot feature.

If you have any other questions about the eufyCam E40, please don't hesitate to contact eufy Support Engineers for further assistance.