Ultrafire 2100, Uniquefire 2100, UF-2100... which one is the right choice?

Sorry about that ....they call it the x power ... Since they have a box I'm guessing they are right and Ric at Cnqgoods is wrong

http://www.fasttech.com/products/1601/10003227/1240401-2020

https://budgetlightforum.com/t/-/15811