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Wireless Power Transfer (WPT) and Energy Harvesting (EH) obviate periodic battery replacements by thus sharing uplifting surgical hazards. WPT achieves power transmission by means of either inductive coupling or RF waves. In contrast, EH extracts bioenergy from body heat or motion. They cooperate to improve the efficiency of the device in both short- and long-term perspectives. The following paper reveals the WPT and EH principles. Also discussed are the state-of-the the art, challenges and future prospects.

Implantable medical devices are transformed by Wireless Power Transfer and Energy Harvesting. These technologies decrease the number of batteries to be replaced and thus reduce surgical interventions. These devices can operate indefinitely by combining WPT and EH. Frequent battery replacements are eliminated and with these, surgical risks in patients are also reduced. Therefore, WPT uses inductive and resonance coupling for efficient power delivery. At the same time, EH scours ambient energy from motion, or bioheat. Such future progress in WPT and EH will improve the medical implant performance. However, it is possible to enhance energy transfer efficiency using innovative materials.

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