So I was one of the unlucky ones to buy one with a battery that has the fault. IBM are aware of the issue but as far as I know they are not replacing them for anyone. Their advice, buy a new battery. I was having to leave the laptop constantly plugged in with the charger.
As if the battery problem wasn't enough, then all of a sudden the keyboard failed. One day it was working fine then without any symptoms of a problem it just stopped working. I started using the on-screen keyboard for a while but quickly got fed up with it because I mostly used the laptop to type with. Ever tried writing a blog post with the on-screen keyboard..Takes about 4 hours longer than with a normal keyboard. So after a few days I went back to my desktop computer again. The X61s has now been left there gathering dust.
I have now put the laptop for sale on Gumtree for spares or repairs. Absolute waste of money really. Would I buy another IBM laptop? No way. If I was going to buy another laptop now, which I'm not planning on doing anytime soon, it would be a HP branded laptop. Any HP product I have ever bought always lasts a long time. My desktop is a HP and I've had it for well over a decade and it's still going strong.