So decide what default processes you don't want and disable or eliminate them. The fact is your battery drain will not be significantly different if you are, indeed, running the exact same tasks.If the OS added new or additional processes that run in the background, that is not my fault. If you mean programs that I have open, well, when Outlook and Chrome are usually all I ever have open, it's not hard to see I'm using it in exactly the same way before & after.
If you're having performance issues, this may help: