Disable Bluetooth Power Save Mode (Trust Nado Bluetooth Keyboard)

Dear Friends

I have a Mac Mini Late 2012 (i5 version) with High Sierra 10.13.6. I have connected a Trust Nado bluetooth 3.0 keyboard the revision 22986. The problem is that I am getting random disconnections, especially when I am not typing for 5-10 minutes and I need to switch off-on to get connected again.

Is there any commands from the Terminal to disable any kind of "Bluetooth Power Save modes"?

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