Idle discharge decreased by turning off wifi
Quick story. Had battery die over night after hitting 50%, and took steps to mitigate it through routines and cache clearing and app optimization. I installed accubattery to get more detailed information. It helped, but not much. Just recently, my phone shut off again when I had near 50% battery left and showed 0 when I started charging.
I was losing 14-16% overnight which I thought was abnormal. Yesterday at a store, I turned off wifi since the store app didn't like the wifi connection. I forgot to turn wifi on when I got home.
Sit my phone down and a bit later I check accubattery, and I see a major difference. Deep Sleep time increased to 96% while screen was off. It was only around 1-3% on wifi. Battery wasn't draining so fast, either.
Well, I wake up today after a long sleep and the battery only drained 2-3% in 10+ hours. Accubattery showing 97% deepsleep with 19h 30m screen off time.
So, apparently if wifi is on, apps will not deep sleep and will drain the battery. If this is the case, I could get an extra whole day out of the battery.