Welcome friends, the video belongs to my customer who contacted me with many complaints such as the Huawei P20 Pro phone is turned off, it does not turn on, its battery is low, it drains quickly, it does not hold, it turns off, the back cover is opened. Upon examination of the product, we determined that the malfunctions occurred as a result of battery swelling and deterioration of its structure, and we resolved the problem by replacing the battery.