Heh, guys, the threads title is a fact. What do you expect to see here? Be shure, android itself care about your battery as much as it possible. Just keep your apps activity under control. Do not need to use rought tools, it may block other apps features and requirements unexpectedly - you may not even notice these (because, most likely, will not get an error message), but you'll never get a user experience, which envisaged by developers.
Basically, you don't need to worry at all, except not to forget dock-in your smartphone at night, and when you are using heavy apps, like 3d games, for example. That's my app about.