Samsung NP940X3G-K03US - Manual (Page 12)

Getting started
12
About the chargeable USB port
• It may take longer to charge the battery when charging a USB
device.
• The battery power level may be reduced when charging a USB
device while the computer is powered by the battery.
• The charging status of the USB device is not displayed on the
computer.
• To turn on the chargeable function while the computer is
turned off:
Open the
Settings application and select Power
Management → USB Charging → ON.
• This feature may not be available with some USB devices.