Get battery percentage over web bluetooth

Hi Gordon!

Thanks, this works. :-) Regarding where to put some info on this: It would be great to have a tutorial, using the Puck.js together with the web bluetooth API (not only with your wrapper class).

Now, I have some other questions regarding this:

1. Do you know if it's possible to connect multiple devices at once via Web Bluetooth?
   
2. Do you know if I can connect to devices automatically via Web Bluetooth? (Let's say: Remember a device and if it's reachable, Web Bluetooth should automatically connect to it)
   
3. Using the characteristicvaluechanged event, I should be able to get the real time data, every time the battery percentage changes, right?