Recharging Wireless Devices via Ultrasound
February 25, 2014 | Terry Sharrer
External means for recharging batteries of implanted devices would alleviate the need for replacing those batteries via surgery. To achieve this, researchers at Piezo Energy Technologies (Tucson, AZ) reported last December on using ultrasound as the recharging source. They detailed: “Charging experiments were performed on 4.1 Volt medical-grade lithium-ion batteries. Currents of 300 milliamperes (mA) have been delivered across tissue depths of up to 1.5 centimeters. At depths of 5 centimeters, 20 mA were delivered. Currents such as these can service most medical-grade rechargeable batteries.” This was done in animal studies; human trials should be upcoming. MORE
Image Credit: Piezo Energy Technologies