After a week of great battery on my M8, I downloaded and installed 'Audible for Android' logged in and downloaded a book... after this, I unplugged my phone at 100%, 2 hours later my battery was on 80% and Audible had 90% of the usage... I un-installed it straight away and everything went back to normal.
So, why not have a list of Power Hungry Apps?
Share your finds, also comment if you see an app listed but you have good experience with that app?
First on the list:
Audible for Android