Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
Common external power supply was published in October 2016. IEEE P1823 is a proposed global standard for a "universal power adapter for mobile devices" (UPAMD) that require between 10 W and 240 W. E.g., Laptops, larger tablets and other mobile devices that can require much more power than the (non-Power Delivery) USB battery charging specification limit of 7.5 W at 5 V. USB battery charging: EU common External Power Supply: EU Future Directions Other (non-EU) initiatives: Common external power supply In 2009 a European Commission initiative resulted in the specification of a common external power supply (common EPS) for use with data-enabled mobile phones