[smikisss123]

I have Sony XZ1 and i have one problem. When my phone is sleeping ( android 8.0 DOZE mode ) and the battery goes down below 15 percent, RED DIODE does not start blinking. If i wake up the phone ( with power button ), then RED DIODE starts blinking. How to know, if my battery is below 15 percent in DOZE mode, if i can't get Red LED notifiocation until i press power button ant wake the phone ?????

[Rukbat]

First replace the battery.

Second NEVER let the battery go below 40% - if you can't charge at 39%, turn the phone off. Then you'll never have the problem again. (Lithium batteries are not deep-discharge batteries. You can totally destroy a brand new lithium battery in a month by discharging it to 0% every cycle.)

You're having a problem because the phone is dropping down way below the voltage the phone was designed to operate at, so nothing is guaranteed.