I have a project I am working on, its a shield that plugs into a DUE and is intended to be a LoRa handheld receiver, likely powered by a Lithium battery. I could build in a discrete push button on\off circuit that uses a couple of MOSFETs, with some resistors and capacitors to disconnect the batter…

Lithium Battery Power On\Off Circuit

jremington October 7, 2016, 8:30pm 7

the IC could just be a 8 pin Micro.

No, it is not.