A connection system for a portable electronic device may allow for modular components to be coupled together. A primary module may comprise computing components, such as a processor, hard drive, wireless chip, battery, etc. Various secondary modules may be removably coupled to the primary module, such as batteries, charging stations, storage units, LTE hotspot devices, cover plates, cameras, virtual reality units, speakers, video screens, user interfaces, etc. The secondary modules may comprise connection posts which mate with receiving slots in the primary module to couple the primary and secondary components together.