Huawei are now rumored to have updated their Freebuds wireless earphones. The new models, which look oddly familiar, are purported to be capable of charging via Qi charging or a USB cable. They may also be capable of charging from a smartphone such as the upcoming Mate 20.
https://www.notebookcheck.net/Huawei-may-wow-the-wireless-audio-market-with-earbuds-that-charge-off-a-phone.333338.0.html