Hi,

Batter life is variable between users. If you are getting 3-4 hours with the SL then that is good, particularly with wifi on always on.

The S70 will be better but by how much I could not tell you. I have wifi turning off when not in use as the S70 connects much faster than the SL. The only issue with this would be if you are using a Nevo Link, then you NEED it on all the time.

As for the music server:
This software has been discontinued. The S70 have exceptional control using UPnP.

Simply run a UPnP server and Player and the Nevo will control it. I’m sure there are UPnP/DLNA servers that support apple lossless.

D.