I hope this is not a prank - extension cable for a wireless mouse?
In case not - I'm using a regular cheap USB 2 extension cable when I have to charge it (and still want to use it). You can also find it on Galaxus for 4.- (e.g. https://www.galaxus.ch/en/s1/product/sharkoon-usb-20-verlaengerungskabel-050-m-usb-20-usb-cables-13488050)