A new wireless charging device developed by Penn State scientists could dramatically improve powering capability for implants while still being safe for our bodies, the researchers said. The new device can harvest energy from magnetic fields and ultrasound sources simultaneously, converting this energy into electricity to power implants. It is the first device to harvest these dual-energy sources simultaneously with high efficiency and operate within the safety limits for human tissue, the team said. ""Our device may unlock next-generation biomedical applications because it can generate 300% higher power than the current state-of-the-art devices,"" said Bed Poudel, research professor in the Department of Materials Science and Engineering at Penn State. By combining two energy sources in a single generator, the power generated from a given volume of the device can be significantly improved, which can unlock many applications that were not possible before.