Welborn Usb C battery for Nikon

[Sayangupta]

Anyone here have any idea on welborn Usb C batteries for Nikon? If any one have used them? I am looking for one EN EL 15  battery. Both small rig and K&F concept make usb C batteries but they don't ship to India due to lithium ion battery regulations. The only cheap option I am getting  is of welborn on Amazon. Please suggest