I've got the TSMC model, so this isn't a dig at Samsung or whatever, I don't care about all that crap. However I'm finding myself having to charge before the day is out, I just went for a 3 hour run, I listen to podcasts throughout that period and I went from 95% to 59% in that time. I turned off data and wifi, yet it's still draining my battery life mad and I'm, not a heavy user and podcasts/music shouldn't use that much battery. I had the same problem on the iPhone 5s when I had one of those, but I sold it and went back to my iPhone 4 while I waited for the S and the battery on that is fine. I don't watch anything on my phone, I don't play games, I don't do a lot with it really, I don't even take many pictures. I had an Xperia Z1c awhile back and I used to get 5-6 days battery on a single charge with how I use my phone. I do the same run every day and on that phone I'd use about 5% battery only. I had a HTC One M7 and that got me 2 days, even my old Nokia 1020 would last me 2 days as well. I don't get why the iPhone 6s is so bad, just turning on the screen will use a whole percent. If I unplug it in the morning at 100%, it'll be nearly dead come 8pm... I'm even using low powered mode, so I would hate to think what it would be like with that off. It just makes me think if maybe Apple need to do the high powered and low powered core thing that you get on Android and Windows Phones.