These are a common battery type in the Electronic Cigarette industry. Is there any interest in creating a charging station for 18650 batteries, selling 18650 batteries or even creating Electronic Cigarette devices?
18650 Batteries and Electronic Cigarettes
They are also used in flashlights such as the tac lights
Personally, I don’t think E-Cigs are an image Anker fits into. Their portable battery banks use Panasonic 18650 cells.