The battery in the PC900 has been upgraded to 5800mAH from 4400Mah in the USA, but in the UK supplied ones are fitted with the 4400mAH batteries. Apparently Asus has offered a free update to those that had a 4400mAH battery in some countries.
I’ve also seen 6600mAH batteries being advertised in the US, should you travel a lot and need a spare?
Also there is going to be a processor update soon to the Intel Atom, I’ve read reports saying the end of June, I personally would wait until it’s been reviewed with the new processor, as I’ve also seen comments that were unfavourable for the new processor.
Harris Chester