Chinese can apply some magic to lithium battery shipments. I don't know how they do it, but I have managed to get all my batteries in decent time.. one, 250Wh bike battery came directly via air mail. It was well packaged and didn't have any honest shipping data Local customs found it and were mildly suspicious.. but didn't open it. So I just declared it as 'bike parts' and paid taxes. Most battery shipments leave china - disappear - mysteriously materialize somewhere at a logistics partner inside EU and come as normal EU-mail bypassing all authorities.. so in most cases there is even no vat, no customs fees..