What does Battery usage show? It may reveal an app(s) running, or if cell signal is poor, the radio consuming power.
There's a lot going on for a phone that is not in use. Cell standby at 17%, may mean that its searching for signal. Clicking on the Cell standby icon should reveal more info and show if there is some time without signal. What is also interesting is the Screen at 11%. Is there an app that lights up or wakes the screen frequently while the phone is not being used?
Thats definitely odd. Try connecting it to wifi overnight and see if thay improves. View attachment 209967
Thank you!
It seems your stand by and Android system ratios are substantially lower than mine. What am I doing wrong? Do I have a defective device. I'm leaning more on the probability of user error
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DL Gsam. There you will be able to measure the strength of the cell signal and a more detailed list of app usage. Also might want to consider DLing and installing Doze.
Root isn't needed, but you would need adb without rootBUT ONLY IF Rooted.