@jcaron Thanks, I will keep that in mind !

@robert-hh ah ok, thank you for explaining. so I set it to 3.28 V and I am on the safe side ;) thanks

@freddy in theory yes but most power banks turn off the output when there’s very little load, such as when the device goes into deepsleep . Also the USB interface will be active and consume a (small but relevant) amount of power