nc8000
Headphoneus Supremus
I knew I had an old post around here which specified just how much battery drain I observed while in sleep mode for 24 hours:
http://www.head-fi.org/t/742609/sony-nw-zx2-hi-end-dap/2685#post_11397972
In short: less than 3% drain per 24 hours. Not perfect. But for an Android-based device? Pretty good.
Yes that's about what I get as well. Usually plays 3-4 hours in the evening and just leave it on stand by for the rest of the time dropping about 3-4% in those 20 hours