M5Stick-C has a battery of 80 mah, but in the off state lasts a maximum of 2.5 days, after which it does not turn on.
Is it possible to put the entire periphery into sleep mode when the M5Stick-C is turned off, or turn it off altogether?
According to my calculations, hibernation of all modules should give a duration of 30 days, and a complete shutdown - years.
Can you update the firmware and increase the runtime?

@heybin Need a list of specific actions

Can I encrypt flash in M5StickC?
Is there any way to protect the firmware from copying?