Unlocked UK Storm faulty psu?

I took the risk of buying a locked storm on eBay with the intention of using it on O2, all looked fine with the device, and I managed to unlock it without any problems, so panic over.... as I thought... however after plugging the power adaptor in to charge it up , I found the clock would flash on and off, and the little bolt on the battery charge wouldn't stay on. :eek:
I was a little worried that the device I'd brought had a faulty connector, to make sure I tested the charge by using the usb cable, fortunately all looked ok. This left me with a suspected faulty mains charger. I took it down to the local Vodafone shop, and asked if they could test it for me, as I had just brought the storm for my wife :D and she was worried the phone was faulty.
Anyway they tested it and found that it was indeed dead, without hesitation they apologised and got me a brand new charger to take away.
Good old Vodafone. :)