When the battery of a Xiaomi phone is low, the chemical reaction rate inside the battery slows, leading to a faster rate of power discharge. Therefore, you can notice slightly faster battery drain when the battery is low, which is a normal phenomenon.
For a better battery endurance experience, please refer to the following information:
1. The most effective way to extend the battery lifespan is to charge before the battery gets too low, ideally around 30%. Avoid continuing to use the phone at very low battery levels.
2. Enable battery saver mode when the battery is low.
3. Reduce screen brightness to decrease energy consumption.
4. Close unused apps running in the background to minimize unnecessary power usage.