Has the replacement light arrived yet?
yes it did, when i was waiting for the replacement, i took the flashlight apart, i just switch the connecter around, from the switch to the driver, somehow magic happened and it worked till now, so i paid the seller for the second one, which he/she did give me a discount. now i have two sunwayman d40a 
"and it worked till now," Does that mean it's not working now?
Glad to hear you have at least one working. I thought the light was ok at first, but it really grew on me over time.
I continue to be impressed by my D40A.
My bad, the original one is still working perfectly fine.
Normally for a popular new flashlight there’s a subset of people who hate it. The D40A seems universally liked.