Samsung Galaxy Tab A 10.1 with S Pen 用户手册

The Status bar at the top of the Home screen provides device information 
(such as network status, battery charge, and time) on the right side and 
notification alerts on the left. 

Battery full: Battery is fully charged. 

Mute mode: Mute mode is enabled. 

Battery low: Battery is low. 

Wi-Fi active: Wi-Fi is active. 

Battery charging: Battery is charging. 

Wi-Fi available: A Wi-Fi network is available. 

Know Your Device 

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Status Bar