HTC Desire 601 User Manual page 38

38 Your first week with your new phone
§ Solid green light when HTC Desire 601 is connected to the power adapter or a
computer and the battery is fully charged.
§ Flashing green light when you have a pending notification.
§ Solid orange light when the battery is being charged.
§ Flashing orange light when the battery level reaches very low.