Sleep mode or auto power on/off for autonomous DJI mini SE

[kripper]

We are looking for a way to 1) power off the Mini SE when battery charging starts and 2) power on when the next mission should be started.

The drone will be charged with a charging pad.

I don't believe implementing a sleep mode is feasible: a low power consumption mode in which the drone can receive a power-on command from the RC while the battery is being charged.

Is there any existing hardware component that could be modified to power on/off the drone? For instance, it would be handy to auto power off/on the drone when the usb port is connected/disconnected, since our charging pad has only two connectors. Or should we just add our own hardware to control the power button? Maybe a IR device powered by an external battery or wired to the led light. Please share your thoughts. I prefer to use DJI's existing hardware whenever possible to avoid increasing the weight of the drone.