How can I check my IQOS ORIGINALS ONE is charged?

To check the charge level of the IQOS ORIGINALS ONE device, briefly press and release the button on the device (for less than 1 second).
The number of LEDs that illuminate correspond to the approximate charge level in the device battery where 4 LEDs indicates the battery is more than 75% charged while 1 LED illuminated indicates you need to charge your device.