i don't know why anyone would want 2...except for bragging rights! i just charge mine nightly and if i forget it will hold at 3.9 on day 4, and i vape quite a lot. i have great love for the Kanger T3 tanks for some reason. i broke my Aspire that i loved and my B&M did not have any replacements so thus the T3. now i have 5 T3s!
I make 11" wood holders, 1.5" wide, 1/2 thick with holes from a step drill bit that just fit my 15ml juice bottles and with the smaller step, just fit the bottom of the T-3's. i then color code the upper silver band of the T3, say purple paint pen all the way around and have a silicone cap on it that has a purple drop on top.
these match to the flavor for that tank. put a drop of purple on whatever juice bottle corresponds to that tank. so purple is RY4, yellow is pina colada, black is melon fresh, etc.
these are in my drawer, next to my chair in the living room. all i need to do is open drawer, match colors and away i go. if going to work, i 'll stick with 'cowboy killer' red band and top and don't have to be concerned about using the wrong juice in the wrong tank. i'm of the opinion that the tank itself holds some of the flavoring of the last flavor so if you mixed say cowboy with pina it could turn out a little nasty. plus i always lose seal when i wash the atty's out and i flood the MVP so i just took to buying a new one. couple of more and i should be set.
just an idea for those of us OCD or just like to be organized, or "organizized" for a nice "Taxi Driver" quote!!!