LG G5 battery drain

Hey, about two months ago I purchased an open box T-Mobile LG G5 from a reputable eBay seller. The first month, I didn't notice any problems, but the past month my phone battery is losing juice much faster. The stock battery setting is saying the top culprits are "phone idle", Android os, castbox (which I do use a lot), and kernel os. I have since downloaded system monitor, better battery stats, and gsam battery monitor. I will post all the screenshots I took of my last full charge down to...

LG G5 battery drain

from Android Authority Forums http://ift.tt/2ECxIbi
via IFTTT