Lithium-Ion Polymer (LiPo) batteries are a favorite of ours. Very light weight and some of the highest energy densities available.

The SparkFun Qwiic adapter board is the perfect board to use if you need to make any old I2C board into a Qwiic enabled board.

The Qwiic Shield (for Arduino or Particle Photon) is the first step in getting acquainted with SparkFun’s Qwiic connect ecosystem. It connects the I2C bus (GND, 3.3V, SDA, and SCL) on your Arduino or Photon board to a series of SparkFun Qwiic connectors.