And as the equipment descends, everything will pass a bank of ultraviolet lights that bathes it with 40,000 microwatts per square centimeter of cell - killing energy. (sciencenews.org)
Instead, the phone harvests the few microwatts of power it requires from either ambient radio signals or light. (sciencedaily.com)
UW engineers have designed the first battery - free cellphone that can send and receive calls using only a few microwatts of power. (sciencedaily.com)