Conventional battery powered and rigid wireless electronic systems are needed to be improved for adapting to the actual food quality and safety monitoring. This paper aims to propose and develop a flexible battery-free wireless electronic system (FBES) for food monitoring by the laser direct scribing on commercial polyethylene terephthalate/polyimide/copper (PET/PI/Cu) film. The FBES ... https://www.diegojavierfares.com/flash-offer-A-D-EJ-123-Newton-Compact-Balance-Scale-120-x-0-001-g-hot-grab/