[Rusty Heap]

Exactly, a "battery powered speaker", with built in charger? Why not just do it right the first time, dig a trench and run PVC pipe out to a passive speaker with speaker wire?

Or, with the right power levels, you can cover your whole back yard with sound with a couple of good speakers on a deck.

don't know, they seem real mickey mousey to me, kinda like a mom who gives you some tools for christmas, that she bought out of the back of Sunset Magazine worthy to work on her Singer sewing machine.......just ain't going to last in the real world.

Happy hoping for you though.