Datasheet

Pinouts
This little backpack is very "short & sweet" when it comes to pinouts:
5V - this is the pin that comes from the USB port power, with 5V DC to charge the
battery.
G - this is the common ground pin, shared with the battery and charger
BAT - this is the voltage out from the battery, which will range from 3.2V when the
battery is dead to 4.2V when it's charged.
Adjusting Current Rate
The default current rate is 100mA, which is safe for any battery 100mAh or greater
capacity. If you're going to be using larger batteries, you may want to bump up the charge
© Adafruit Industries
https://learn.adafruit.com/adafruit-pro-trinket-lipoly-slash-liion-
backpack
Page 8 of 12