Bigger Better Battery?

[revisionA]

I was wondering if there was any super powerbook battery, cost being no issue, to push toward 7-8 hours? pretty please? I'd pay 300 bucks easy!

$

 

[yellow]

Hmmm I don't think there's much out there that will come close to 7-8 hours.. but there are these:

http://eshop.macsales.com/item/Newer Technology/BAP15AL4800/

 

[Dreadnought]

There are also solar cells bricks (don't know if that is the correct translation), which you can hook up to a laptop, increasing the time of your battery. Don't know if they produce enough power to charge the battery.