Battery-Free Implants Market by Powering Technology (Near-Field Inductive Coupling, Resonant Magnetic Coupling, Far-Field Radio-Frequency Powering, Ultrasonic or Acoustic Powering, Optical or Photovoltaic Powering and In-Body Energy Harvesting), Implant Architecture, Clinical Application, Implant Location, Ecosystem Offering, Geographical Regions, and Leading Players - Trends and Forecasts, 2026-2040