How Green is Wearable Tech?

Wearable tech is of interest to Green ICT because it can drive miniaturization and energy efficient. Miniaturization can reduce resource consumption in the creation of ICT gear and reduce e-waste in its disposal. Miniaturization combined with energy-efficiency can enable a host of applications ranging from "smart building" sensors to compact assistive technology. Is more wearable tech all positive? We look at a number of global trends and technologies.

Telecommunication equipment manufacturer Cisco reported in February 2014, "By 2018, we estimate that, there will be 177 million wearable devices globally, growing eight-fold from 22 million in 2013 at a CAGR of 52 percent...Regionally, North America will lead ...with a 42 percent share in 2013 going to 34 percent by 2018. Other regions with significant share include Western Europe with 25 percent share in 2013, growing to 26 percent by 2018, and Asia Pacific with 21 percent share, growing to 25 percent by 2018. The wearables category will have a tangible impact on mobile traffic, because even without embedded cellular connectivity, they can connect to mobile networks through smartphones. Globally, traffic from wearables will account for 0.5 percent of smartphone traffic by 2018. Globally, traffic from wearable devices will grow 36-fold from [1.7 petabytes per month in] 2013 to 61 petabytes per month by 2018 (CAGR 105 percent). Globally, traffic from wearable devices will account for 0.4 percent of total mobile data traffic by 2018, compared to 0.1 percent at the end of 2013."

One technology linked to wearable tech is Bluetooth Low Energy (BLE), a wireless protocol designed to let devices perform near-field communication with a low battery drain. I bought my first wearable BLE product - a heart rate sensor - in 2013. Its BLE feature lets me use my iPhone 5 as a monitor and recorder, eliminating the need for another piece of e-gear - a watch-like monitoring unit.

Yet Apple is working on a a smart watch, as are others. So will I need a high tech watch after all?

This is the potential downside of wearable tech: more e-gear that we never knew we needed!

The upside is more innovation. UK _Connect's Energy Harvesting SIG studied Apple's smart watch patent: "…the battery will be assisted by a kinetic energy gathering component and by ambient light energy collectors as well as a sensor which can detect whether the watch is flat or curled. This suggests that the device will work by harvesting energy from movement, such as the motion of the user's arms, only coming out of standby mode when a sensor detects the device has been rotated to face a certain way. Additionally, the use of an AMOLED (active matrix light emitting diode) display can help, since it allows individual pixels to be turned off. For instance enabling only the parts facing the owner's eyes to be activated." (
Apple's patent application for "Bi-Stable Spring with Flexible Display") reported in June 2012 on "…an ultrathin crystal chip that converts footfalls into electricity. Developed by Anthony Mutua, a recent graduate of Mombasa Polytechnic University College, the device generates a charge large enough to power a cellphone when it’s subjected to pressure, say from the act of walking or running. The technology is so promising, in fact, that Kenya’s National Council of Science and Technology, which funded Mutua’s prototype, is bankrolling its commercial production." IDG reported in October 2013 that commercialization is underway. "Through his company, HATUA TECHNOLOGIES, the mass production phase has begun after Mutua secured partial funding from the Kenya National Council of Science and Technology...This is a green energy technology that will help reduce carbon footprints from the diesel engines or car batteries that are used to charge the phones."

"Kinetic energy gathering", "ambient light energy", and "footfalls into electricity" are examples of Ambient Energy Harvesting, a growing source of clean power for devices.