M's battery life is not good. Most of impressions said that they could only listen M around 3hours before battery runs out.
And you guys not gonna believe it!
Some of M users said about 'noises' comming out whenever they hear some hd-tracks, and guess what is the answer from the ceo of calyx.
M's amp is so good that some headphones' drivers can't handle the 'super accurate signal' from M, causing high frequency resonances(he didn't even bother to mention that the users talked about non-music noises).
And he added that most ceos of headphine companies agreed with his conclusion, and of course, he can't say who the ceos are, because it will make them ebarrassed.
End of the story enjoy the show!
Read my review posted sometime back earlier on this thread on the demo unit in Jaben SG. I commented also on the battery life of Calyx M.
If you look at the above picture, the battery life left is at 74%. I started at 100% at around 13:10. So after 44 mins of messing around (at 13:54), battery life has already dropped by 26%... Also the battery life % indicator is slightly bugged. Before it hit 74% (at 13:54) when it was around 84% left (at about 13:30), I did a reboot and the indicator went back up to 91% after it rebooted but quickly drop back to 8x% after that.