Give your Teensy astepper/DC motor driver, GPS, LED matrix or OLED add-on with ease. With the space left over, we even added in a 500mA LiPoly charger that automatically charges over USB and will switch over to the LiPo when USB is unplugged. There's also a 100K resistor divider for monitoring the battery voltage connected to A7.
Comes with one assembled adapter, shorty headers for attaching your Teensy 3, and both standard and stacking headers so you can use your Teensy in a breadboard and even plug a shield on top. Some soldering is required!