https://www.techradar.com/news/huawei-mate-20-may-double-as-a-wireless-charger-for-airpod-style-headphones

Huawei's AirPods-imitating Freebuds earbuds may launch alongside the company’s next flagship smartphone and perform a neat wireless charging trick to boot.

The 'Freebuds 2 Pro' can be put in their pillbox case and placed on a wireless charging pad to recharge, according to a new leak. Or users can put the case can on the back of the upcoming Huawei Mate 20 or Mate 20 Pro to refill the headphones’ batteries.