so I connected them as left/right channels while charging and began streaming a Spotify playlist

PLUS the playing of two with the left channel coming out of one speaker and the right channel of audio through the other

We didn't realize that you can set two units up in stereo (Left and right channels

An added feature is that you may Perritte with a Nother unit to create a left and right channel

The fact you can run left and right channels is awesome!