According Specifications and Requirements - Power supply
3.3V Buck with < 1uA of quiesent current. 750 mA ouput max
Operating range 3.0 to 6.5V
In my experience, if the supply voltage goes under 3.3V, the buck switches off. I guess, that’s a “left over” from an older design. With that, does the 6.5V applies to the feather in v5 ?
(I currently plan to use 4× 1.5V batteries in order to have about 5V (+/- 1V direct from battery) for some sensors. The sensor I2C bus still supports the 3.3V I/O so it’s only about the power supply of that sensor.)