What is the light in the upper left corner of Huawei mobile phone? The little light is on all the time.

1, the red light flashes when the battery is low.

2. When there are messages such as missed calls, unread messages, unread emails, and push messages from some third-party applications, the green light flashes.

3. When charging, the low battery red light is always on, the medium battery yellow light is always on, and more than 90% of the green light is always on.

Generally, the indicator light is orange when charging, and it turns green when it is full. During normal use, when there is a SMS or WeChat notification message, the indicator light will flash green, and there will be a prompt when the battery is low.

The battery turns red when it is insufficient, yellow when it is charged, and green when it is full. Usually flashing indicates unread information.