OK, So I checked your link:
I have this same one, and encountered issues that i wasn't aware of, until I asked about it on here. Just like you!
You will need a usb wall adapter with more power than you got with your Ego. You need one that does at least 1 amp I think. You can buy 2amp wall adapters on eBay etc. This will give you the full 5 volt experience. (dont use LR atomizers on this though)
Mine does work on my computers USB port, but i dont think its working at the full 5 volts its designed to. I have a Macbook Pro though, and I think these have pretty powerful USB ports. A lot of laptop/pc usb ports dont have sufficient power. Give it a try though, if its not powerful enough, it wont harm.. it will just not work, and the end will flash every time you hit the button.