Addressing significant battery drain in an Android application requires a systematic approach to identify and resolve the issue. Here’s how I would tackle it:

First, I would analyze the logs to identify any patterns or specific scenarios where the battery drain occurs. This involves running multiple test cases and conducting manual tests to consistently reproduce the issue.

If the logs do not reveal the root cause, I would review the application's resource usage. Components like the camera, GPS, or network can significantly impact battery life, so I would check if these resources are being properly managed. For example, if the camera is used, I would ensure it is released immediately after the photo is taken.

Next, I would examine whether there are any background services or tasks running unnecessarily. Optimizing background processes to run only when needed can help reduce battery consumption.

If the application uses multiple threads, I would assess their management. Excessive or poorly managed multithreading can lead to high CPU usage, which drains the battery. I would look for opportunities to reduce the number of active threads or optimize their execution.

Additionally, I would check if the application is using wake locks correctly. Wake locks should be used sparingly and released as soon as they are no longer needed to prevent the device from staying awake unnecessarily.

Finally, tools like Android Studio's Battery Profiler can provide insights into battery usage patterns and help pinpoint the components consuming the most power.

By following these steps, I can systematically identify and address the factors contributing to battery drain, ensuring the application is optimized for better battery performance.