Asus EEE SLATE EP121 - Manual (Page 7)

ASUS Eee Slate vii
Charging Your Batteries
If you intend to use battery power, be sure to fully charge your battery
pack before going on long trips. Remember that the power adapter
charges the battery pack as long as it is plugged into the computer and an
AC power source. Be aware that it takes much longer to charge the battery
pack when the Eee Slate is in use.
Remember to fully charge the battery (8 hours or more) before first use
and whenever it is depleted to prolong battery life. The battery reaches its
maximmum capacity after a few full charging and discharging cycles.
Airplane Precautions
Ask an airline personnel if you want to use your Eee Slate onboard an
aircraft. Most airlines have restrictions for using electronic devices. Most
airlines allow electronic use only between and not during takeoffs and
landings.
There are three main types of airport security devices: X-ray
machines (used on items placed on conveyor belts), magnetic
detectors (used on people walking through security checks), and
magnetic wands (hand-held devices used on people or individual
items). You can send your Eee Slate through airport X-ray machines.
But do not send your Eee Slate through airport magnetic detectors
or expose it to magnetic wands.