Lenovo YOGA Tablet 2 Pro-1380F Safety, Warranty & Quick Start Manual page 6

Starting to use your YOGA Tablet 2 Pro
Before using your YOGA Tablet 2 Pro, you might need to charge the battery.
Charge the battery as shown.
Connect your YOGA Tablet 2 Pro to a power outlet using the included cable and USB
power adapter.
Low battery
Turning on/off
Taking screenshots
Press and hold the On/Off button and the Volume down button at the same time.
Fully charged
Turn on: Press and hold the On/Off button until the
Lenovo logo is displayed.
Turn off: Press and hold the On/Off button for a few
seconds, then tap Power off.
Charging