Asus initially sent out review units with the higher capacity battery, the company has been shipping Eee PC 900 models with a lower capacity battery that runs out of juice a little sooner. When Hong Kong customers complained, Asus caved and allowed people to replace in their 4400mAh batteries with a 5800mAh battery for free. But UK customers will have to pay £10 + VAT to trade in their batteries.

Mobile Computer reports that the offer should be available in the UK starting June 10th.

[via EeeUser]