I see from previous post, that a lot of people thinking that this is a scam, but I am not scammer, and my hobby batteries 18650 21700 and others.
This subreddit has been taken private from June12 in support of the strike on reddit to protest the upcoming changes to the pricing structure for the reddit API and related rule changes. ------- You probably want all your electronics to run on the 18650 lithium-ion cell. You just don't know it yet.