I have battery saver and auto brightness usually on. I am a heavy user of this device and I am usually getting 18 hours before it's almost dead.
I bought a second battery just in case for work but I have yet to open the package. Coming from the Note 3 the battery in this thing is amazing.
I just switched back to Android so I'm behind the times... Is Battery Saver a legitimately helpful app? So much clutter in the app store with these types of apps