Out of 5 Dell Mini batteries I have, 4 have died over Christmas, well it's probably been since late October when I got my M101z, but now I cant get any of my 3 Mini 9 batteries or my Mini 1010 battery to work!
It's sod law my bloody Mini 12 one works fine (hasn't lost any juice at all) as that's by far the worst of them.
Let this be a lesson, keep checking your Minis are alive!
I'm gonna probably sell them as I don't see the point in buying a battery for a laptop that I don't need anymore,. Even though my Mini 9 does have sentimental value it's on it's 3rd battery and about as many chargers and the 64GB runcore has burnt out too, I think it's time to let it die