Wow. This thread has been entertaining.
This thread may have warranted a different title.
Cyber-bullying happens on ECF, now, huh?
To the OP,
The answers to your inquiry are easy:
The source must provide ample power to the drain.
One or both (source and/or drain) should have some protection (over charge>drain/over drain<source)
If your drain is unregulated/unprotected, the full amperage of the source is supplied
If your drain requires a limited (let's say 1amp) supply and your supply is offering 2amps, you're withing spec. The circuit of your drain will only pull 1amp. It will prevent the full current of the supply by its regulation
If you attach an un-regulated drain of +2.1amps to a source which is regulated to supply that only offers 2 amps, the most current you'll get into your drain is 2amps
I hope this answers your questions. To be short, yes, you can hook an eGo PT to a PSU, as long as the PSU supplies the current required by the PT to function. Both should have protection.
To all the hijackers, thanks for the useless entertainment
OP, post in the correct area from now on. ECF does like to help when presented with ideas in the proper manner.
ETA: the PSU that you have pictured is 4x 3000mah 18650-parallel, providing 8-20amps to the internal chraging circuit. That circuit uses the excess amperage to produce the supply voltage of 5v. The circuit regulates the supply voltage to 2.1amps. If you connect something that draws more than 2.1amps, the PSU will not function. Basically, you're safe. Stick a belt-clip on that thing and go about your business with your portable, week-long PT.