Why would you want a different charger than what came with the N900?
It WAS made for the N900 and it has Output of 1200mA
And thats why my N900 fully charges in an hour if im not using it!
It might be almost $12 but dam that is still cheap!
Id rather buy the original one and spend $12 once than buying the cheaper $4 and having to replace it 3 times lol

AC-10E for $11.75