You can’t have any development board without some sort of prototyping area, the SparkFun Photon ProtoShield takes care of this. This ProtoShield mates easily with your Photon module and provides a small soldering area and separated power and I2C hook-ups. With the SparkFun Photon ProtoShield you have the control over what kind of project you design for your Photon.
The SparkFun Photon Battery Shield provides you with an easy way to power your Photon module with a Lithium polymer battery. Not only can the Battery Shield power you Photon but you will also be able to charge a LiPo bettery through it as well. The board comes with a JST connector for your single cell LiPo battery and utilizes the Photons on-board micro-USB connector for the charge input.
Perfect for any prototyping project, the Tripler provides space to add-on up to two FeatherWing accessories without any stacking header needs. Compatible with the newest generation of Particle developer kits (Particle Mesh).