Just to follow up, I borrowed my boss's mini9 and confirmed his battery works fine in my mini, my battery won't charge in his either. So it's dead. One year, barely used, always topped off, and it won't hold a charge AT ALL. We use Dell pretty exclusively at work but reading the forums here and on their site, they really **** the bed on the battery supplier for this thing. I ordered the 8 cell monster from MyDigitalDiscount and it reports 10 hours left after charging. Nice.
Still. Dell wants $99 for a replacement. Really? Someone could have at least made an original size battery that you can crack open and fill with AAs, that would make some kind of sense at least, for the crap lifespan you get from them. *Might* eventually get a replacement off ebay, but when it's only $15 less than the MDD one, why bother?