Wow - 9ml tank is huuuge! Mine is 2 and it is too small for me, but i was aiming for something like 4....
Party problem is the same for me. Battery works for maybe 70% of a day, but i don't like the taste when the battery goes down. Btw i use 0.6 coils with 55/35/10 liquid. For next i want to test the 0.5 coils. Not for the more power, but they have bigger air-holes and i hope to get a 'deeper' feeling from more airflow.
Tonight i was allowed to test a smok blabla tank with quad coils - it was increadibly good! I didn't like the strawberry liquid in it, but the fog was so fking smooth...
After that experience i am more sure than ever that i want to have a better device. Still checking different tanks and stuff....i want to evolve but i don't want to go crazy....