My Mum bought a BT cordless phone for a landline, and the batteries were 40 pounds. A new phone only cost 25 I think, so she bought a new one when it ran out.
> Edit: Or a battery pack like described in the article.
Why would you want to pay extra to get 8 cells bundled together in a pack when you could just get 8 cells individually?
Not only are you getting closer to the commodity part rather than an assembly that's specific to the device in question, you also gain the ability to replace individual cells when they go bad.
Running on AA-style cells like that is a huge plus to me; I hope other manufacturers pick up on it.
How about a "dustbuster" style hand-vac with replaceable batteries? That would be awesome!