This has been discussed over and over, and no. It is better for the end user to get our own custom made battery, than a 14500 - which is an overrated battery, of low to medium quality.
The reason the eGo is so good, is partly because of its own battery - thats where it gets its high battery life from - if we were to put a 14500 in there, you would _NOT_ get as long battery life, not to mention the design could not be so small and sleek.![]()
This really is so true, you can not underestimate it...
.. and coupled with Mik's groundbreaking revolutionary design,
with the most popular atomizers in the world..
... there you have the eGo!

(sorry for a lil bit of ...-lickin' there people..