I was wondering what kind of connector that is...now I've looked it up. Why would a manufacturer add connector to measure one specific type of battery? Was eGo that popular?
Actually I think it's even older than eGo. The original vapes were cigalikes and perhaps somebody with a longer memory can supply the name. The white "shaft" was the battery and the brown "filter" was a screw on cartridge-atomizer ("cartomizer") stuffed with cotton and prefilled, with female threading. They also sold a battery pack that looked like a cigarette package that you used to store and recharge a spare, on the go.
I ordered a set of these from China at considerable cost around 10 years ago, with like 2 dozen tobacco juice cartos, but they were so terrible I seem to have repressed the memory.
Edit: I remember now: It's a 510 threaded male connector.
Edit: Curiosity got the best of me and I dug back in my e-mail archives. The kit I bought was the "E-Cigarette E9" from e-cig.com, back in November of 2009.
E-Cigarette E9
Base price US$53.95
Features/Options:
Select Battery Color: White
Select Battery Length: Long Add US$1.00
Select Tip Color: Green Add US$0.50
Select Tip Light: Green Light Add US$4.00
Select Cartridge Color: Brown
Select Nicotine Density: (5). Extra High, 24mg
Select Taste: Marlboro
1x US$59.45: US$59.45
Cartridges for E9 or U9 Cartridge with Atomizer 4 pcs/pack
Base price US$6.25
Features/Options:
Select Cartridge Color: Brown
Select Nicotine Density: (5). Extra High, 24mg
Select Taste: Marlboro
10x US$5.63: US$56.30
U9 Cable USB Cable for E-Cigarette E9 Save your E9 battery and charger
Base price US$25.95
Features/Options: Select Color: White
1x US$25.95: US$25.95
Battery for E9 Special Rechargeable Battery 3.5-4.2v
Base price US$18.85
Features/Options:
Select Battery Color: White
Select Battery Length: Long Add US$1.00
Select Tip Color: Green Add US$0.50
Select Tip Light: Green Light Add US$4.00
1x US$24.35: US$24.35
Order amount: US$174.05
Took me a couple weeks to realize that the problem wasn't me. Went back to smoking. It collected dust for a several years until I finally tossed it out in a move. Returned to vaping in 2012 when the technology had improved.
And I found this funny old thread about it:
E-Cigarette E9 sucks.