I want an ultra violet led. and an infra red one. infra red in chrome, ultra violet in matte black.
Aso fot teh battery staying on, it's possible you got a little vapour blown into the battery, or a little juice leakage, it sounds like the auto switch is getting stuck on. When it stays on after you stop drawing air through this causes fast overheats and shortens carto life, which is doubly bad.
You can clean the battery, I don't know a link to a thread for that, but I'm sure someone does, or you can take longer draws (ie, draw to the cutoff) which Is wha tI do - these draws need to be slower than your current draws so your lungs can take it all in (but they're also so much more satisfying imho) - You will, however, be generating almost the same amount of heat, which means either more time between draws, or as many of us here do, get 2 batteries/PTs with a cart on each, and alternate them.
If you like the shorter draw, then you'll have to clean out the battery/pt and hope you can get that to work. Unfortunately there's no other way around it. And hopefully on your next batt you won't get leakage into it.
This is also why I try to get manuals more than autos (although I like both) as while buttons will sometimes get sticky on a manual, you can't leak into them.
But if you get manuals because you have some leaky overfills, then remember to clean the threads/top of battery out whenever it gets gunky, as that will interfere with the current path, adding an alternate path for some of the voltage, and lower the power of your vaping/run batts down faster (and can be bad on rechargers also)