Can the power saving mode really save electricity?

Power saving mode can really save electricity.

An extreme power saving mode, specially designed for standby, which only retains the functions of calling and short messages, that is, minimalist mode, which is basically the most extreme power saving mode. Back to the state of function machine, there is no function except communication function, and the most important thing is that there is no background running program.

Deep energy saving mode

First and foremost, the first step is to limit the running of background programs and only keep the applications you want. Everything else is dormant. Apple's IOS system may do this, but whether Android can restrict background applications is still unknown. If there is one or two rogue software on the mobile phone, it will definitely not work. Without limiting the background, the maximum power saving cannot be achieved. Another necessary choice is to reduce the processor frequency, that is, actively limit the speed of your mobile phone, which is not harmful to the power-saving mode.