Energy havesting bluetooth or zigbee devices

Is anyone aware of any energy harvesting Bluetooth or ZigBee devices?

It would be great to have open/close,movement sensors and temp sensors that didn’t require batteries :slight_smile:

The only one I know of is this Philips Hue remote.

IIRC they use Enocean’s technology under the hood. They offer some interesting stuff but I haven’t seen it in other products yet.

I’m really hoping for a breakthrough here. Swapping batteries is getting old…