Charge the battery
The battery may not be fully charged at first. It's a good idea to
fully charge it as soon as you can.
Connect the micro USB cable to Nexus 7 and to the charging unit,
and the charging unit to a power outlet:
IMPORTANT: Use the charging unit and micro USB cable
that come with your Nexus 7. Other charging units and USB
cables may charge more slowly or not at all.
Turn on & sign in
To turn on your Nexus 7, press the Power button on the right edge
near the top for a few seconds, then release it.
The first time you turn on the tablet, you'll see a Welcome screen.
NEXUS 7 GUIDEBOOK