OK, I had to comment about this great little device.
There is more top outer threads than a Triton battery, so it takes a bit longer to twist on a tank. The 510 threads work well, however... Because of the long-throw sprung center pin, it's a bit tricky to screw on a 510 atty. You have to push down while turning. But every tank I have was able to be used on the adapter.
You find the same push/twist having to be used to get the adapter onto a Triton battery. But as Evie's pic shows, it is the same diameter as the top of a Triton, and looks great, only adding 5/8 inch to the effective length.
So the toughest to screw together is a 510 atty onto a Triton, due to the spring center pins.
I really like this for a couple of reasons. One I didn't realize would be so eye-opening. I can finally compare batteries. The VV Triton vs a VV twist 1300 eGo vs the 20 w iStick... Now I really understand how "hot" the iStick is with the means volts. I have to set the iStick to about 3.8 "iStick" volts to equal the Triton bat's 4.2 volts.
I think every Triton owner should have this adapter.
