Why does the Redmi Note 13 Pro charge slowly after being used for some time?

Thank you for your support of Xiaomi products. If the Redmi Note 13 Pro is running multiple APPs or tasks in the background, the charging process will slow down. The phone undergoes strict professional investments before leaving the factory, so you can use it with confidence. Please use the standard charger to charge your phone. By default, the acceleration mode is turned off on all phones.
You need to follow the steps below to manually enable acceleration mode to shorten the charging time:
1. Go to [Settings]; 
2. Tap [Battery]; 
3. Tap [Additional features]; 
4. Tap [Speed up charging].