There is no odd one out.
These are all energy harvesting sources that have been successfully used.
The Car Fridge is Thermal Energy Generator Source
The Electric Drill is an Inductive Energy Source
The Electronic Cymbal is a PiezoElectric Source
The Drum Synthesiser is a Current Loop Source
The wires coming out of the each device are tap points that I have attached to harness the energy without affecting the original function of the devices.