1. Technical Field
The present disclosure relates to portable systems, and particularly to a portable system with a power adapter.
2. Description of Related Art
Nowadays, most portable devices, such as notebook computers, mobile phones, cameras, and personal digital assistants, display the percentage or level of voltage or charge remaining on the rechargeable batteries. However, for some portable electronic devices, when the rechargeable battery is being charged, and the portable device is not powered on, the level of charge may not be displayed. Therefore, the charging progress of the rechargeable battery cannot be known, which is inconvenient.