M3 Mobile US20 Series - Battery Hot swap

US20 Series
User Manual
41
☆ Key Setting
 You can change the function of the 3x3 matrix by
selecting the star (☆) key from the menu.
 Select the button to change the function.
Use the ☆ Key
 Pressing the star key on your device's keypad displays
a 3x3 matrix with nine symbols.
 Select and press a number from 1 to 9 to print the
corresponding character at the current cursor
position.
4.3 Battery Hot swap
Sometimes people want to swap the battery without rebooting a device.
Because,
1) Not saved application data is erased when device is rebooted.
2) Rebooting Time is too long.
Battery Hot swap function prevents this situation.