The money you save with DX is not worth the trouble they put you through. The most patient customers in the world will eventually give up on DX.
They are no better now than they were 4 years ago on my first order. Much of their product is flawed and defective. They function basically as a clearinghouse for junk no one else wants to sell.
As others have stated, you can find nearly the same price from more reliable, professional sellers. Here is a list of reviewed and rated sellers of batteries, flashlights, etc: