I bought it from eBay for $7
I need to contact him before he ships it if it is fake.
are there any disadvantages for not having that visor thing around the lens?
Do you mean the crenelated bezel, vs. a smooth bezel?
Yes that thing 
It won’t make much difference unless you’re planning on using it as a weapon/glass breaking tool, it’s more just for aesthetics.
When the light comes please throw the battery and charger away right away.
Very unsafe.
That’s a Sipik SK73 copy.
A cheap zoomie like the more famous SK98 copies.
Not all have a crenellated bezel.
+1. (Though, properly speaking, one should recycle batteries.) Lots of crappy/dangerous batteries around, especially on the ’bay. You don’t have to spend mega bucks to get a good name brand battery/charger from a reputable dealer.
I have the light and like it! Got it for $6 and change! Floodmonster.