This is off the DX website, presumably same applies to KD and all other overseas suppliers.
I expect that they will eventually make alternative arrangements via sea freight rather than loose business.
Dear Customers,
Due to the tighter security measures in air cargo service recently, all mail items entering the Air Mail Centre now are subjected to X-ray screening which leads higher risk on the refusal of the packages that contain lithium batteries. The airmail packages to all over the world are supposed to be delayed because of more frequent custom inspection.
In DX, batches of packages that included lithium batteries have been returned while some of them are still on the way on return. As not to cause further delay on the shipment, we are advised to cancel and fully refund for such orders. So if you ordered products with lithium batteries and there is no update on the airmail tracking website yet, please wait for a few more days and see if it is returned. We will contact you once your packages arrive at our warehouse.
At the same time, the inquiries for tracing packages have increased dramatically which causes backlog of tickets now. Please trace your order through the following links if it hasn’t arrived at you yet.
http://cs.dx.com/FAQ/Detail/135 If you have done the tracking already and your ticket remains unanswered. Please allow us for few more days to catch up and we will always be your side to solve the problems for you.
We sincerely apologize for all these inconvenience caused to you. And thank you very much for your understanding and patience.
Best regards
DX Team
My avatar is a poor likeness.