电池关闭25％ -- battery 领域 和 charging 领域 和 battery-life 领域 android 相关 的问题

I've read that battery calibration apps are only a placebo effect and they do nothing. Is this true? What to do if your phone suddenly shuts down at 25%?

Battery calibration being a myth was asked here Bought a new battery, do I need to calibrate it? - incidentally by you :-), so yes to repeat, it's a myth (see Izzy's answer that stressed this)

To address shutting down at 25%:

• If the battery is old or heavily used I would first change the battery

• Check if the behavior persists in safe mode. If it does go to next step. If it doesn't it's caused by some app you installed (unlikely)

• Do factory-reset. If it continues, flash stock ROM (updated if available) or custom ROM

• If none of these help head to service center get an estimate and choose between repair or replacement of the device