/g I need some advice.

I can't seem to find a decent vape. I have been using once for a few months and it's had me cut down on real cigs by quite the metric fuck ton, which is going amazingly for my health, but my battery part goes bad within a month or sometimes even less. So my question to the vapers of /b is this:

Which "pen", "battery", "not the tank part" do you use or suggest?

Thanks for your time /g/entleman