When it comes to a charger, it goes beyond clout. People buy brands like XTAR because they expect them to be safe and not wreck their batteries.
If that were not so, most vapers and other such battery users would just use
these.
Furthermore, it's listed as "authentic", so if it isn't, that's a question of integrity on the seller's part.
I never check authenticity codes on mods and tanks unless they are defective. But I do on chargers, before I even plug them in.
Vaper buys pod system, asks for a 510 adapter. LOL for days