Help How to disable auto-boot on Android device


Hi everyone,
I've just bought a EgoIggo S95X Android Box (Android 6.0, 1GB Ram, 8GB ROM) but there is an issue that bothers me a bit:

Everytime I plug the device in a power socket (or whenever I press the ON button on my power socket adapter) the device turns on automatically, but I would like for it to not do that and only turn on when I press the power button.

I've searched for similar issues but I've only found people wanting to do the opposite (having the device turn on automatically when plugged).

Is there any way to fix this?
Thank you!