Hello! Yes, there are some people who have successfully run their Android phones without a battery, including the Poco F1. However, this is not recommended as it can damage the phone's hardware and it may not function properly.
To achieve this, you will need to modify the phone's hardware and software. First, you will need to remove the battery and find a way to connect the phone to a constant power source. This can be done by finding the power pins on the phone's circuit board and soldering wires to them, which can then be connected to a power source.
In terms of software, you will need to find a custom ROM or mod that supports booting without a battery. This may require some research and experimentation, as not all custom ROMs are compatible with this setup.
Overall, it's important to note that running an Android phone without a battery is not recommended and can be dangerous. It's best to find another solution for your Baby Camera project.