I have just recently switched from my Janty Stick V1, V2, and V3 to the Ego....
I loved the flavor and TH of the stick, but the batteries were just too much to deal with. I travel Internationally for a living, and a small, discreet, reliable device is something that is required for me to vape comfortably and safely while overseas, especially in the middle east.
I am an extremely heavy vaper, and I can get roughly 8 hours on my Ego batts. If I am working flights that day I have gone as long as 19 hours without a battery change. Thats a flight from the States to Germany and back... while this isnt the norm for most people, I just vape less when Im in the air.
Ego batts are stock batts that are commercially manufactured. I believe they are the standard protected batts as the ego isnt technically a mod, does not vape over 3.7V, and does not use two batts stacked on each other... so most of the things that are believed to cause these batt explosions are nil.
Check out the Janty forum, and read up on the ego.
If this isnt the route you would like, I have heard great things about Vapor4lifes KR808D "The Vapor King" I have tried them out and love them, my order will soon be placed. Im hearing about 4-6 hours on the XL battery.
Good luck,
RIAFlight25