I've been using Kangertech Protank 2 clearomizers with an Eleaf for a few years now. I generally vape at 5 - 6 watts and under 4 volts with 2.4 ohm coils. I'm really tired of coils lasting only 2 - 3 days sometimes whether they're genuine Kanger or rebuilt ones. Sometimes the genuine ones taste nasty from the get go and sometimes the ones I rebuild don't work at all with the error message "no coil" or "atomizer short". I like the clearomizers but I'm thinking I'm pretty limited to what coils I can buy for them. If a person wanted a coil that would last at least a week, even in a different type of tank, what should I be looking for? Or isn't there such a thing? Thanks in advance.