Fiio M15 - Double Tap to Wakeup; Disable Charging

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Double tap to wakeup
Click the “Double tap to wakeup” option, the screen can be wake up by double-clicking in sleep
status.
Disable charging
There is an charging prohibited function. It means when the M15 is connected with computers or
chargers, it would not be charged in order to protect the battery. It also eases the heat dissipation