OK I got my usb penstyle
E-cigarette USB Battery: for pen style e-cigarette today and i'm well happy with it. It took 2 days to get from China to the U.K and then 5 days via Parcelforce to get it to my house in Scotland. (The 2 days from China includes the time it was in customs.)
Speaks volumes for for Royal Mail.
The usb DSE901 is
Mini e-cigarette USB Battery: e-cigarette usb edapter and is the same price $10.3 (£6.90 ?)
There's plenty of power from it and no more having 3 batteries charging constantly. When the smoke gets less it's just a matter of putting in a New cart. Another bonus is that i don't think it goes through the dreaded "self clean (destruct) cycle". I had to pay about $22 shipping but i was at the point where i was going to have to buy a couple of new ordinary batteries anyway which would have cost almost the same in the UK.
Plenty of length on the usb cable, plenty of vapour constantly'cause it don't run down

The fact that it constantly gives the same power really shows up the health of your Atomisers. Some of my Atomisers that have been through the self destruct cycle and then been cleaned (by me)just don't work or hardly work. So now i know which of my atomisers have life left in them and which i can bin.
Also if i want to i can attach it to a USB Battery Pack so i could take it out with me.
I hope UK sellers will start selling these as they are very very useful.
Obviously don't know the lifespan yet but i would suggest that if you want to buy them from China buy a lot of stuff so that it makes the shipping go further as it's done by weight.
Overall Score
Battery Excellent
Supplier Excellent

Parcelforce UK Booooo...sssssssssss
deewal