Are you looking to make your PyPortal into a portable project? Sure, you can use a USB battery pack, but what if it needs to be slim and enclosed? That's where the Adafruit PowerBoost comes in!
The 2-pin JST cable from the battery connects directly into battery port on the PowerBoost 1000C. Voltage and Ground wires from the PowerBoost 1000C connect to the 3-pin JST port on the PyPortal (doesn't matter which one).
- 5V/VCC pin from PowerBoost 1000C to 3-pin JST(VCC) on PyPortal
- GND from PowerBoost 1000C to 3-pin JST(GND) on PyPortal