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Abstract—A summary of our recently developed bacterial microrobots with an overall length of a few micrometers with the main efforts, experimental data and preliminary designs towards the development of fully autonomous bacterial microrobots for future operations in an aqueous medium, is briefly presented. Due to technological constraints in microfabrication coupled with limits in electrical energy sources and conversions that can be embedded in future fully autonomous untethered microrobots only a few hundreds micrometers in overall length, the energy requirement collected through embedded photovoltaic cells is minimized by exploiting the motility of flagellated MC-1 Magnetotactic Bacteria (MTB). The encapsulation of such bacteria in special micro-reservoirs embedded in the microrobot provides the mean of propulsion. Directional control of the microrobot is achieved from an onboard microcircuit inducing a torque on a chain of single domain magnetic nanoparticles called magnetosomes embedded in each bacterium. Integrated 3D coil solenoids based on standard CMOS technology are used to generate local magnetic fields to orient the swimming directions of the bacteria inside the micro-reservoirs. Index Terms—Magnetotactic bacteria, microrobots, photovoltaic cells, untethered microsystems, magnetotaxis, controlled bacterial actuation I