Not sure if you might be interested, but Provape has a new box mod: the Radius which is 40w, uses a replaceable 18650 (Samsung 25R included with mod), and has a USB for charging the battery + allows for upgrading the firmware. Provape has an excellent rating for stability and safety (not saying there aren't other vendors, just that Provape is well known for it). The Radius does not have TC at this point, but that
may be a feature they introduce later through a firmware update. Those that have purchased it are very happy with the vape experience and battery life. If you are interested, a link to the thread appears below. If you have any questions about the device, anyone in the thread will be happy to help. I personally haven't purchased one at this time, but I do own provaris, so it is just a matter of time (and a sale

)
https://www.e-cigarette-forum.com/forum/threads/official-provari-radius-thread.703712/