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iPhone Case Harvests Energy From Radio Waves

Nikola Labs, from Ohio, showed a new iPhone case at TechCrunch Disrupt this month, which harvests power to extend battery life. The case ($100) will debut on Kickstarter in June. Radio waves are converted into DC power, using excess energy from Wi-Fi, Bluetooth and cellular signals. The conversion – using technology from Ohio State University – works passively to extend battery life by up to 30%.