I'd be wary of those links you have posted Chronus (unless you know better and have had dealings with them) neither seem to have either an address or phone number. The 2nd one is definitely in China. Check out the small print on Contact, Returns etc.

lotvic - I hear your concerns, but I recently ordered a new laptop keyboard from what I though was a UK supplier. Turned out it was a Hong Kong based company, trading through a spares supplier in Cardiff. The delivered item (next day) was the wrong model. An email to HK produced an apology with the correct KB being delivered the next day. Didn't even have to send the wrong one back.

Chronus, Totally agree "The operating system has nothing whatsoever to do with a laptop battery" it's a fact. (and I'm still saving up to get a Tablet - so am jealous you've got one ;-))

The battery will work OK regardless of operating system as stated by others previously

Windows 7 uses a different method to interrogate the batteries performance and this will not work well with some older type batteries.

So if you have an older laptop but with windows 7 installed it may tell you the battery level incorrectly (hence the warnings on the adverts - this battery won't work with windows 7) the battery works but the level indication is wrong.

Is this guide what it is wanting to do? Sorry if you thought we were 'chatting' I was just concerned that you got new battery from somewhere good to deal with.