Recommendation for battery powered devices that work well with HA

Hardware
1

Hi,
Anybody using battery powered speaker with HA ( or other battery powered devices excluding sensors ) please link to the specific devices tested

2

I use a JBL link 20 JBL Link 20 | Voice-activated portable speaker works as google cast so easy setup and been using it in the garden for a few years now. The newer versions will no doubt perform as well or better.

3

Thank you very much