Extending Your Smartphone Battery Life ⇥ nytimes.com
For what it’s worth, I’ve left virtually all of these settings alone and I get great battery life. I don’t ever toggle my cellular connection or WiFi, almost all of my apps are allowed to refresh in the background, and notifications are enabled based solely on need-to-know rather than battery life.
Nobody should ever have to worry about these settings. You should be able to use your phone normally and assume that it will manage battery life for you; at least, in an ideal world.