I've been having this issue too. I can adjust the headphones a little bit and they'll start to play. It's happening with three different headphones, too. Where do you go for Nokia repair, in case it's a hardware issue?
I don't think its just you. I downloaded the spotify app, and made an offline playlist of about 350 songs. When i listen to it on random, i'll get maybe 3 hours with my phone. If it's running in the background, it seems to drain it down even more.