Toshiba Satellite U920T - Manual (Page 33)

Figure 2-4 Changing to the Laptop mode
Do not lift the computer by the display panel.
Connecting the AC adaptor
Attach the AC adaptor when you need to charge the battery or you want to
operate from AC power. It is also the fastest way to get started, because
the battery pack will need to be charged before you can operate from
battery power.
User's Manual 2-5