And imagine you are using the machine in an industrial app and you need it to work in 5years time.
How much will they charge you for batteries then when they are the only source?
That's why we pay so much for Psion handhelds now
I think your machine is Acer Aspire one :)
I bought a netbook lately, Asus Aspire One. It cost £179, and a new/spare battery for it costs £80. That's just obscene.
edit: ACER Aspire One.