In this case, if the cable is damaged, the buckle is damaged, the cable buckle can only be replaced, and only a professional can be replaced, and the maintenance is on the line. When the battery is close to the key life point, there will be this phenomenon. Capacity is reduced, the performance is not durable. It's hard to switch charge. It's hard to charge. When using a mobile phone, it will suddenly shut down automatically, which is also the result of a sudden drop in voltage.