Troubleshoot for mobile phone battery power changes too much

At present, the battery power of the mobile phone is measured by software, and the accuracy cannot be guaranteed. It is normal for the battery to change a little (or even increase) after restarting. If the battery level changes frequently and fluctuates greatly, you can do the following:
1.Upgrade to the latest MIUI system.
2.Consume the battery until it is fully charged after shutdown.
If the battery level is still changing frequently and is unacceptable, you may apply for after-sales testing.