For about the last 8 to 9 years, I have been using joyetech ego batteries with vivi nova 2.5ml tanks. I make my own ejuice and rebuild the atomizers. Recently my stock of ego batteries have run low and I cannot find any joyetech ego batteries or even comparable batteries made by other manufacturers to purchase online. So I recently purchased some endura t-18's to utilize with the vivi nova tanks. I first tried using a vivi nova tank with a 2.0 atomizer head on the t-18 and it burned right away on the first hit. So I made another atomizer to 1.5ohm, but the battery will only allow me to get one hit before it fritzes out. I would like to continue to use the vivi nova tanks, since I still own so many of those and I rebuild/rewick them. Are there any other batteries (not box mods) that you would recommend to use with my vivi nova tanks? Any other ideas or suggestions?? Thanks in advance for your response!