Earlier quoted context omitted.
Do you currently have tracker tags on those things? If not, why not? Multi-year lifetimes are already available with Tile (3 years), AirTag (>1 year), and Samsung's SmartTag 2 (700 days), using BLE detection instead of 4G detection. Millions of these would not degrade signal. A random bit of metal (like a quarter, as shown for scale) in between you an a 4G tower should have the same effect as one of these devices. Th…
Thanks. I miss-read it and thought it's energy harvesting from celular. I already have some trackers on important stuff (like keys and school bag of kids if they loose it in the bus). But for other use cases it's either too large (cats) or makes no sense to have too many because then I'd have to replace a battery every few weeks ("everything else").
It's not app or Bluetooth based (has an included detector) and it works pretty well. Battery is supposed to last a few months. It easily fits on a cat collar and doesn't bother mine at all. I've been looking for something like this for years and someone finally made one!