Core UDC30 Help!

[graveltrap]

Hi guys,

I've manage to miss place the input power lead for my Core UDC charger, I've grabbed a few bits and pieces from Maplin to make up a quick replacement, but one thing is stopping me...I don't know the polarity of the 2.5mm/5.5mm DC power plug!

So the question is what is the polarity of the plug? negative outside and positive inside or positive outside and negative inside?

The information should be on the back of the mains power supply that core sell for UDC30 if any one has one.

Information would be much appreciated as I would very much like to be racing on Sunday!

Cheers!