Yes Dashvapes is a trusted source. They perform battery tests on their cells….nothing extravagant. Can’t recall the name, but they source from one of Mooch’s recommended retailers out of the US. They have consulted Mooch in the past to question authenticity and I have seen their name come up from time to time in the credits of Mooch’s videos…if that has any value to you.
They will stand behind their product. It is always possible for a counterfeit to enter the market unnoticed, so if you receive a fake, Dashvapes will honour a return. For 18650’s they only carry LG HE4, HG2 and Samsung 25R and 30Q. all of which are very good cells.