A member of the Aspire One User forums has posted a few pictures showing what appears to be an Acer Aspire One with a 6-cell battery. The computer currently ships with a 3-cell battery. In the image above you can see two Aspire One computers, one with the standard battery and the other with the high capacity battery which should provide twice the battery life.
No word on when you’ll be able to pick up a computer with the higher capacity battery or if Acer plans to sell the battery separately. Heck, for all I know this could be a third party battery or a fake. But it sure looks pretty (in that sticking out of the back not-so-pretty way).