Datasheet

During the super sleepy mode you're using only 300uA (0.3mA)!

While its not easy to get the exact numbers for all of what comprise the 300uA there are a few quiescent current items

on the Feather 32u4:

2 x 100K resistors for VBAT measurement = 25uA

AP2112K 3.3V regulator = 55uA

MCP73871 batt charger = up to 100uA even when no battery is connected

The rest is probably the Atmega32u4 peripherals including the brown-out detect and bandgap circuitry, ceramic

oscillator, etc. According to the datasheet, with the watchdog and BrownOutDetect enabled, the lowest possible

current is ~30uA (at 5V which is what we're testing at)

https://learn.adafruit.com/adafruit-feather-32u4-radio-with-rfm69hcw-

module

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