I started on socilites battery and tanks, was fine at first, then I moved to a kanger pro mini 3 tank, and a innokin vv4 itaste battery ive only had the battery a month and at 1st amazing, now the battery dies after 4 5 hours, b4 it lasted at least a day, yup I use it a fair bit and I really enjoy using it, but its getting frustrating, that the battery is no lasting as long, I don't know anything about mod batterys and if I do upgrade will I still b able to keep my kanger pro mini 3 tank on a mod battery? ill see what suggestions I get from leaving this thread. x