I’m interested in upgrading from the half-disposable crappy $5 ecig batteries from eBay that I use with prefilled cartridges I get from the dispensary. But there are just so many battery companies out there, with most seeming to be made by the same couple of Chinese factories with different logos stuck on -does anybody have a line on what’s actually reputable and worth the money? I don’t mind paying for quality, but I sure don’t want to pay extra for a fancy marketing scheme. It also has to be very light weight - I have a clover overlord adjustable voltage battery that I rarely use because it’s too big and damn heavy, even though it works well. I’ve never tried the batteries that look like a key fob, but would be happy to if recommended… Thank you everyone!