I'm getting the Sonos Move for Christmas (actually already have, wife will not let me touch it yet) and I have a question.

While I definitely plan to use the speaker on battery power from time to time, I wondering if there is an adverse effect on the battery for leaving it plugged in for long periods of times? Also will the battery degrade if not used often.  Just a couple questions that just popped into my head as I try wait patiently to Christmas morning.