The Circular is, naturally, a battery-electric vehicle, using a solid-state pack built up almost entirely with recycled materials, and fully able to be recycled. The bodywork above the pack cuts back on the number of necessary parts as much as possible, and connects those parts in ways that avoid glues, adhesives, and composites to make them easy to disassemble. This means cords, press studs, quick-release fasteners, and a custom, laser-etched fastener dubbed "joyful fusion." (Remember, joy is the way forward for BMW.) The joyful fusion connector is fastened and unfasted in a single rotation with a special wrench. The ease of disassembly combined with features like over-the-air upgrades could lengthen the useful life of a vehicle.