Is there such thing?

[camobag]

My girlfriend is going on a long flight to Hawaii this Thanksgiving and really wants her computer to last. She asked me if there was such thing as a portable power extension that would give her more power. I told her about buying another battery, but she still insists on seeing if there is one. Do you guys know of any?

[pinto32]

Don't most planes have outlets now?

[LimeLite]

Outlets are one choice. I'm actually pretty sure that ADC makes a battery pack type device. Let me see if I can find it.

[kanker]

Go to you favorite reseller and search for and auto/air adapter, generally go for $70-80.

[sonofslim]

yes, there are products like this. i've never used any and can't vouch for them, so you'll want to do your consumer homework, but look for products from N-Charge (or just NCharge?) and Electrovaya. they're generally thin pads containing power supplies that rest under your laptop.

[jxyama]

like you thought, i'd think the long term usability would be much better with another battery...