I only have about 6 hours on them, the battery is still telling me 70% so that's good. I use them throughout the day, mostly to listen to podcasts. (I did set my phone to mono and just left or right to save some power, I normally only listen in one ear) I did listen to some music in stereo to test it and it sounded good, a little bass heavy but hey they are advertised to have EXTRA BASS! I have a big neck (19" collar) and they are quite comfortable, a little pressure but not bad. I was using the Sony WIC400 and they were tighter and less comfortable, I bought them for the battery life, but after about 8 months I think I got some sweat in them and they failed. Hope the WISP510 with the IPX5 rating hold up to sweat! Also on both of the Sony's I was able to upgrade to small Shure replacement foams (orange and labeled to work with E2c), I find them more comfortable and secure. The little ear hook on the WISP510 does provide some extra stability and the build quality an plastic material seem upgraded from the WIC400. Thanks Crutchfield!!
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They are a little loose in my ears but I probably could fix that by using the adjustments. The battery life is very good (much better than my Beats that these replaced because my beats just stopped working). I was unsure when I ordered but have been overall very pleased.
Pros: Long battery life Easy to pair
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