16340 and 14500 aren’t really made by any of the major OEMs. With the exception of the Sanyo UR14500P they are all rewraps and there is no promise of consistency under that wrapper. Efest and Vapcell are sometimes good and sometimes not.

Ultimately being in the US you probably don’t want to bother with the hassles of importing cells so you will be kind of limited to a handful of trustworthy US-based shops. These are all of the 14500 and 16340 cells that they stock :slight_smile: