## Powercast

## Texas Instruments

[Ultra low power harvester power management IC with boost charger, and nanopower buck converter](http://www.ti.com/product/BQ25570#)
> ... microwatts (µW) to	milliwatts (mW) of power generated from a variety of high output impedance DC sources like	photovoltaic (solar) or thermal electric generators (TEG) without collapsing those sources
[from a variety of DC energy harvesting, high-impedance sources like photovoltaic (solar) or thermal electric generators (TEGs) without collapsing those sources.](http://www.ti.com/lit/ds/symlink/bq25505.pdf)

## Drayson Technologies http://getfreevolt.com/

[40m pounds financing up to date](https://www.crunchbase.com/organization/drayson-technologies#section-overview)

> [Energy harvesting might soon be seen in a number of everyday items. In the UK, for example, Drayson Technologies has developed Freevolt,](https://knowen-production.s3.amazonaws.com/uploads/attachment/file/3933/IoT%2Bdrives%2Bprogress%2Btowards%2Blow-power%2Btechnology%2B_%2BFinancial%2BTimes.pdf) an energy harvesting technology that harvest the
> ambient radio frequency (RF) energy from created by mobile phones and WiFi transmissions.
> Drayson has already used FreeVolt to power its Cleanspace tags for monitoring environmental
> pollution, but now it’s working on bringing the same technology to credit cards.

> “Smart cards are becoming more secure, but like many technologies, they need more energy to
> achieve the increased levels of security and privacy demanded by the market,” explains
> company founder Lord Drayson, a former Labour government science minister. A credit card
> equipped with Freevolt, for example, could capture RF energy when placed on card readers and
> smartphones, and then use that to run on-card security functions such as biometrics, he says.

## [First battery-free cellphone makes calls by harvesting ambient power](https://www.washington.edu/news/2017/07/05/first-battery-free-cell-phone-makes-calls-by-harvesting-ambient-power/)