Why is my phone running out of battery quickly?

Question

Mobile devices

The Xiaomi Redmi 5 plus phone, which has been with me since 2018, began to quickly spend its charge. The main consumers are the screen and the Android system. I can't reflash it, it's my main phone. What to do with it?

Screenshots

Answer 1

change the battery
99% of the problems is it, in 5 years, even with perfect use, any degrades.
ps 6 days of work?! and 'these people' complain that android does not last long on a single charge

Answer 2

set BetterBatteryStats and look at the Deep Sleep parameter (deep sleep) how many percent of the time they take and monitor whether the parameter increases if the display is off. We put BatteryMix, there is a little more advanced statistics, + if you go to the Design section and hold down the square button on the display / sensor of the device, a menu will pop up, select Detailed information in it and tap on details in the new menu. You can see how quickly the battery charge drops during operation. If you surf and it takes you 1% in 3-4 minutes, this is bad and most likely the problem is not so much software as iron (the battery is dead, the radio network signal is bad or the smartphone picks up too many frequencies at the same time, some of which do not contain data, perhaps stupidly increased power consumption due to an unoptimized software update or somewhere there were problems with the wiring, perhaps the firmware has changed the operation of the CPU and it often works at boost frequencies, instead of energy-efficient low ones) If the Deep Sleep parameter does not increase while the display is off, then this indicates a software problem and the software does not allow you to fall asleep, for example, instant messengers, a bunch of software and Google services .. This needs to be cut down and cut out through the root, tk. part of the software cannot be disabled / frozen. Still synchronization eats a lot

Answer 3

The battery is dying
Do not charge the battery with high currents and fast charges
And watch for ripples of the variable component