Can anyone advise a external laptop battery powersupply that they have that works

[ribanner]

Can anyone advise please?

Specifically I am asking for one that someone has and knows it works, not one that MIGHT work, but hasn't been tried in anger

Obvoulsy a link to a spec would be great.

Many Kind thanks

[Pantaloonie]

http://forum.xda-developers.com/showthread.php?t=374139