It charges over USB, and plays while charging, so you could just leave
it plugged in. But it does seem to turn itself off after a period of
inactivity, so that may be a killer in your application.

John

In article , bulleid@ku.gro.lioff
says...
>
> In message , John
> Aldridge  writes
> >Another "not what you asked for" post, but might a cheap battery powered
> >bluetooth speaker do the trick? E.g.
> >
> >https://www.amazon.co.uk/dp/B01HTH3C8S
> >
> >Which I've just tried on my RPi4, but I don't see why it wouldn't work
> >on a RPi3.
>
> Thanks.
>
> It says that it will play for 15 hours, but it gives no indication as to
> what the battery life is if it is turned on, but not playing (e.g.
> standby).  Something else that I didn't mention in the original post, is
> that this would be on 7*24, although it may not be used at all on any
> given day.  So anything battery powered is unlikely to be suitable.
>
> Adrian

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