Laptop outlets in coach: a problem which need not exist

Tuesday's Wall Street Journal "Quick Fix" feature by Raymond Flandez was about where to find power for your laptop when you're flying coach.

I find the whole subject beyond bizarro: why would you even bother going through the effort, and wasting the time required to find a solution as outlined in the story (below), when you can avoid the issue entirely by bringing your computer on board with a fully-charged battery and a spare ready to go?

Anyway, for those who'd rather work hard than smart, here's the article.
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Laptop Outlets in Coach

•The Problem: Where to plug in your laptop when you're sitting in coach.

•The Solution: Most airlines have power ports in first and business class, but for coach passengers seeking laptop access, it helps to know where to sit.

Continental and American, for example, offer power ports in economy on some planes, but only in certain rows.

US Airways and Delta provide them in all seats in the cabin, but only on certain aircraft.

Check your flight itinerary online to find out what plane you'll be flying.

Then go to SeatGuru.com, which shows the location of the power ports for about 175 aircraft and more than 20 airlines.

A black dot on the seating map indicates a power port.

The laptop icon on SeatGuru.com also tells you if your laptop adapter is compatible with the power port in the seat.

AC, Cigarette and EmPower are the three most widely used types of ports.

•The Caveat: JetBlue and Southwest don't have ports on their planes.