Battery Drain

[buckeye0430]

Hello! 

I just recently bought a new Nexus 6P -- I'm coming from an iPhone 6 -- and I'm noticing that my battery is draining really fast while I listen to Spotify, at around 20% battery utilization. Note: I have all my music downloaded, as I am a Premium member. This issue never arose when I was using my iPhone 6. Typically, from what I've read, the 6P is supposed to get an average battery life of 16 hours, but I'm barely getting 4-5 hours. 

Any advice or help would be great! I love Spotify, so this is a real bummer for me. 

Thanks.