Phillips used to make a great switch, for instance, that was powered by the piezoelectric effect and didn't need batteries. I got a good deal on mine but regular pricing was unreasonable and it's been replaced by something nowhere near as cool. Sengled switches work well and are well priced but whenever the power goes out (10x a year at my location) they drain the battery trying to contact the hub, so I've spent in CR2032's whatever I saved.
(I'm glad Phillips avoided making the own goal of selling off the Hue brand because we'd still like to have a few Western brands in this space. I mean, they are getting their ass kicked by the likes of
https://us.govee.com/products/govee-curtain-lights?srsltid=A...
as it is without a western competitor to DJI we'll probably lose Boeing and Airbus within my lifetime)
The difference is that is does not come with a remote - instead there is either a phone app which can be used to directly control it or it can work with Alexa/Home Assistant.
I think it's a great way to "smarten" some older "dumb" devices.
https://community.home-assistant.io/t/getting-started-with-b...