> Buy a cheap inverter and you're done.

If your computer blows out while using a cheap inverter that is not
recommended for use with specific computer model by your computer
manufactured, your warranty will be null and void. There is a great
difference in the quality of power output by the various inverters on the
market... and some computers are more particular about their power source
than others.... You would think that 110 v is all the same... but it's
not... some inverters put out square sine waves... others modified/simulated
sine waves.... others still true sine waves.... and it does make a
difference to some computers.

Bill