FujiFilm X100T Owner's Manual page 48

Charging the Battery
Charging via a computer
The battery can be charged by connecting the camera to a computer. Connect the supplied USB
cable as shown, making sure the connectors are fully inserted.
Connect the camera directly to the computer; do not use a USB hub or keyboard.
If the computer goes into sleep mode while charging, charging will stop. To continue
charging, disable sleep mode on the computer, and disconnect and connect the USB
cable.
Charging may be impossible depending on computer specifications, settings or
conditions.
The battery status icons show battery charge status when the camera is turned on, and
the indicator lamp shows it when the camera is turned off.
Battery status icon when
camera on
(yellow)
(green)
(red)
Indicator lamp when
camera off
On
Off
Blinks
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Battery status
Battery charging.
Charging
complete.
Battery fault.