HTC One M8 - Manual (Page 15)

Charging the battery
Before you turn on and start using HTC One, it is recommended that you charge the
battery.
Use only the adapter and the USB cable that came with HTC One to charge the
battery. When the battery power is too low, make sure to use the power adapter to
charge, not the USB cable connection with your computer.
1. Insert the small end of the USB cable into the USB connector.
2. Insert the other end of the USB cable into the power adapter.
3. Plug in the power adapter to an electrical outlet to start charging the battery.
§ As a safety precaution, the battery may stop charging to avoid overheating.
§ When you're using the Internet and charging the battery, HTC One may become
warmer. This is normal.
§ To conserve energy, unplug the power adapter from the electrical outlet after you
finish charging.
Switching the power on or off
Switching the power on
Press the POWER button until HTC One vibrates.
When you turn on HTC One for the first time, you’ll need to set it up.
Switching the power off
1. If the display is off, press the POWER button to turn it back on. If you've set up
a lock screen, you need to unlock it.
2. Press and hold the POWER button for a few seconds.
3. Tap Power off on the options menu.
15 Unboxing