SMK Offers Battery-Free Solution for IoT with
Combination of Energy Harvesting and WPT Technologies

   SMK Corporation has established the industry’s first*1 hybrid technology that combines two types of power supply systems: energy harvesting technology that converts renewable energy (indoor light, temperature, vibration, etc.) into electricity, and far-field wireless power transfer
(WPT)*2 technology using sub-GHz microwaves, which is attracting attention as a next-generation energy source. This solution enables battery-free remote controls, sensors, and other IoT devices, and solves the issues of IoT technology such as battery replacement, running costs, and battery disposal. The two individual power supply systems can also be used independently.
   In recent years, with the accelerating global efforts toward carbon neutrality, the amount of carbon dioxide emissions is becoming a key factor in market valuation. Using renewable energy through this new technology will help reduce carbon dioxide emissions and will also contribute to raising customers’ corporate value.

■ Benefits

- No need to replace batteries, reducing running costs and making IoT
  devices maintenance-free.
- No need for dry batteries, making devices thinner.
  (Reference) Thickness of AAA battery: 10.5mm, AA battery: 14.5mm
- Improved drop impact resistance due to weight reduction by battery-free
  design.
- Improved water resistance and robustness by eliminating the battery
  cover.

   SMK will continue to proactively products and technologies that contribute to the advancement of the IoT society and a carbon-free future.

*1 According to SMK's research
*2 Far-field WPT: Different from the proximity (near-field) WPT systems that are already in
     practical use for charging mobile devices, this system enables power transmission to a
     distant location (about 5 meters) using radio waves.