Asus N43JF - Manual (Page 17)

Notebook PC User Manual 17
Bottom Side
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The bottom of the Notebook PC can get very hot. Be careful
when handling the Notebook PC while it is in operation or
recently been in operation. High temperatures are normal during
charging or operation. DO NOT USE ON SOFT SURFACES SUCH
AS SOFAS OR BEDS, WHICH MAY BLOCK THE VENTS. DO NOT
PUT THE NOTEBOOK PC ON YOUR LAP OR OTHER PARTS OF
THE BODY TO AVOID INJURY FROM THE HEAT.
The bottom side may vary in appearance depending on model.
The battery pack size varies depending on model.