Power Management
Battery + USB Power
We wanted to make our Feather boards easy to power both when connected to a
computer as well as via battery.
There's two ways to power a Feather:
You can connect with a USB cable (just plug into the jack) and the Feather will
regulate the 5V USB down to 3.3V.
You can also connect a 4.2/3.7V Lithium Polymer (LiPo/LiPoly) or Lithium Ion
(LiIon) battery to the JST jack. This will let the Feather run on a rechargeable
battery.
When the USB power is powered, it will automatically switch over to USB for power,
as well as start charging the battery (if attached). This happens 'hot-swap' style so you
can always keep the LiPoly connected as a 'backup' power that will only get used
when USB power is lost.
1.
2.
The JST connector polarity is matched to Adafruit LiPoly batteries. Using wrong
polarity batteries can destroy your Feather.
©Adafruit Industries Page 29 of 263
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