From observing my battery I realized that the more you fill rootfs the more faster the battery would drain Having something like 10-15% left on rootfs would indeed give you terrible battery life.

Also the program shortcutd did something to my devices battery life >_>. Ever since I installed it, my battery goes through leaps and bounds. One sec I'd have 87% battery life, I'd lock my screen for 3 mins or less and It drops down to 80% and thats without apps or wifi running. Uninstalling it helped, but It still drops like this from time to time, but like once every few days.

I don't know if the program messes with the battery indexing or anything. If anyone else is willing to test or testify to this that'll be great, just to make certain my prob wasn't caused by shortcutd.