someone posted on my returning to vaping thread about a lot of things changing in the last year that i had gone back to analogs. yesterday, i hunted for a t-rex style kit and ordered one from the first states based company that i could find that had it in stock....[hopefully, it won't take long to get here now that i've made this decision--patience isn't what i carry in great supply heh] anyways...i'm seeing all of these amazing designed batteries in multi-colors or engraved on...well, they are just down right "pretty" what they don't tell me, [and i've seen them on several sights now] is what type they are.....i'm assuming that most of these are 510s? i'm just wondering if i can mix n match them with the egoT setup? anyone know? thanks!