This is the perspective of someone who isn't picky about sound qualities, it's not a bad trait to have, but if you just like listening to music while you walk like me, it's nothing to complain about. The audio quality is good, the worst thing really is that strong bass overpowering mid-range and treble, but not by much.
Battery life is good, very good. I've barely ever had a problem with low charge in my time owning these headphones. I think one of the worst things about this headphones is how it interacts with my phone, it's got a microphone but this pair of headphones doesn't work well when I receive a call. Overall, I would kind of recommend this set, at least maybe as a backup, it's nice not having to squeeze pennies to purchase a pair of good headphones.