What does the indicator on the Xiaomi 15 Ultra Photography Kit represent?

Please refer to the following details to check what the indicator statuses represent:
1. In the charging scenario, when the indicator keeps in red, the grip is charging, and when the indicator keeps in green, the grip is fully charged;
2. In the non-charging scenario, when the grip is not connected to the phone and quickly pressing the shutter button, the indicator is kept in green and goes out after 5 seconds, which means the grip power is more than 20%. The indicator is kept in red and goes out after 5 seconds, which means the grip power is no more than 20%. When the grip is connected to the phone, the indicator is kept in green and goes out after 5 seconds, which means the grip power is more than 20%. The indicator is kept in red and goes out after 5 seconds, which means the grip power is no more than 20%.