> My laptop battery died suddenly so I measured the voltage which was zero,
> Curious, nothing to lose I took the case apart and found the black
component
> arrowed
> http://i29.tinypic.com/j9acrd.jpg
> open circuit it is the main connection between battery pack and circuit
> board, Battery measures full voltage before this device.
>  This is a Klixon 4MM470B1 10v9k  thermal/current breaker, this device
does
> not seem to be Available in the UK.


A quick google came up with this supplier in Wales:

http://www.charcroft.com/pages/sub_pages/klixon.htm

and, following a link on the site:

http://www.sensata.com/products/controls/battery-mm.htm

Worth a call but they may not want to offer small / 1-off quantities.