[Verizon LG G4] mfun89:
This is just a simple guide that made my LG G4's battery life double (No exaggeration) after root. Please let me know of any other ways people have been saving battery since rooting their phone, and I'll happily update the original post with any suggestions and I am completely open to criticism and comments.

1. Greenify

-Greenify doesn't let apps use your battery in the background, and depending on how many power eating apps you have, the more of a dramatic increase in battery life you'll see.

-There are more advanced options, which you need Xposed Framework for, but the regular root options should work fine for most users.

Link- https://play.google.com/store/apps/details?id=com.oasisfeng.greenify&hl=en

2. CPU Tweaking Apps (Ex. SetCPU)

-One of the first things I recommend doing once you download this app is to set the CPU governor to "powersave". I haven't seen any drop in performance, and I definitely think it is well worth giving a try.

-Another thing you can do is underclock your CPU, but after doing this I started to see lag around the UI, without a significant enough battery difference, but it won't hurt to give a try.

-A great app I found was QuadCoreManager, which has a feature that turns all cores off except for 1 while the screen is off, which saves a lot of battery in standby since the phone doesn't need all 6 cores to run without the screen on

SetCPU- https://play.google.com/store/apps/details?id=com.mhuang.overclocking&hl=en

QCM- https://play.google.com/store/apps/details?id=seaskyways.quadcoremanagerplus&hl=en

Wifi Scan Interval

-If anyone knows a better way to do this please tell me, but there is an app called Pimp My Rom that can alter this setting. It basically just changes how often your device scans for wifi, which is a battery drainer for sure. This app hasn't been updated in a while, and is pretty buggy, but it gets the job done.

Pimp My Rom- https://play.google.com/store/apps/details?id=com.androguide.pimpmyrom&hl=en

Boosters Plus Batterysaver PRO

-This app is $6.99, so it clearly isn't for everyone, but I can tell you that the battery saving feature in this app is no joke. Most of the apps on the play store I've tried didn't work, or hindered performance. The app basically makes android run more efficiently, and it's made my SOT go from 3-3 1/2 hours to getting 6 hours. A friend of mine recommended it to me and I was a little skeptical but I am happy I spent the money on it. It also comes with some performance enhancing options, an internet booster, and a digitizer booster. These additional things actually do work, but in a much less dramatic way when compared to the battery saver feature. After first enabling it, I got 56 minutes of screen on time, and I dropped 10%.

Link- https://play.google.com/store/apps/...apps.android.boosterplusbatterysaverpro&hl=en

Again, please let me know anything I left out, and tell me what I should add to the list since I probably forgot some things. I'm not looking to take credit for anyone else's finds, so I'll be sure to add the username of the contributors of this guide to the OP. I hope this was a good start, and I can't wait to see how everyone else has improved their G4.